The short version
Tasks stay unfinished, or open forever, when there’s no clear definition of what “done” actually means for that specific task. For most of your life, someone else defined done for you: a teacher, a rubric, a manager, a deadline. Once you’re running your own household or your own workday, that external referee disappears, and a lot of adults with ADHD have never actually built the skill of setting their own finish line. Below: why this happens, a way to borrow from clinical goal-setting to define done for yourself, why a giant to-do list makes this harder instead of easier, and a small daily practice (pulling just two tasks at a time, and deciding done for only those two) that makes the whole thing doable instead of tedious.
Why do I struggle to know when a task is done?
A task stays unfinished when its endpoint was never clearly defined, and an unclear endpoint is much harder for an ADHD brain to work toward than a clear one.
For a lot of tasks, especially the open-ended ones like cleaning, organizing, or writing, there’s no natural stopping point built in. You can always wash one more dish, tidy one more corner, edit one more sentence. Without a defined finish line, the task doesn’t end so much as get abandoned, usually with some amount of guilt attached.
Perfectionism makes this worse in two directions. Some people get stuck before they start, circling the task and waiting for the right conditions instead of beginning. Others start easily but can’t stop, going back over something that was already finished to refine it further. I’ve written before about managing perfectionism and procrastination directly, so I won’t rebuild that whole conversation here. What I want to get at in this post is something underneath it: even once you’ve made peace with “good enough” as an idea, you still need a way to decide what good enough actually looks like for the task in front of you. That’s a specific skill, and almost nobody teaches it.
Why doesn't anyone teach you how to define "done"?
Because for most of your life, someone else was doing it for you.
School handed you a rubric. A test had a right answer. A manager approved the deliverable or sent it back. Every one of those structures gave you an external, observable signal for when a task was finished, and you never had to build the internal skill of deciding that for yourself.
Then you become an adult managing your own home, your own inbox, your own parenting, and most of that external structure disappears. Nobody tells you when the laundry is done. Nobody grades the birthday party planning. The task is just supposed to end somewhere, and you’re expected to already know where, even though nothing in your life actually taught you how to find that point. That’s not a character flaw. It’s a skill gap, and it’s an extremely common one.
What does "done" look like in clinical practice?
In cognitive-communication rehab as a speech-language pathologist, a patient’s discharge criteria were never “perfect cognition.” It was a specific, observable description of what functional looks like for that person’s actual life.
For five years, writing treatment goals was part of my daily work. Discharge criteria never said a patient had to have flawless speech or perfect memory. They said something like: this patient can initiate and follow their daily schedule using a memory aid, independently, most of the time. Done was defined around what that person actually needed for their real life, not around an abstract standard of perfection nobody was ever going to hit.
That’s the piece I think is missing from most advice about “good enough.” Good enough isn’t a feeling you talk yourself into. It’s a specific description you write down in advance, the same way a treatment goal gets written down, so you have something concrete to check the task against instead of an internal sense that never quite settles.
How do you stop a big to-do list from feeling defeating?
A list with everything on it is the wrong list to work from every day. Separate the full list from the daily list, and only decide what “done” means for the small number of things you’re actually doing today.
I ask clients to keep two different lists, not one. The first is a weekly brain dump: everything on your mind for the week, treated like a menu rather than a plan. Nothing on it needs to happen today just because it’s written down. Anything that isn’t relevant to this week moves to a later list, so it’s captured and off your mind without demanding a decision right now.
From that weekly menu, each day you pull a 2-do list. Not a to-do list, a 2-do list, the number two. Exactly two proactive tasks, chosen because they matter, not because they’re loudly urgent. Urgent things tend to get done on their own. It’s the important-but-not-urgent work, the stuff that actually moves your goals forward, that needs to be pulled out on purpose or it never gets touched.
Two items is small enough to actually finish. Finishing builds momentum and gives you real evidence that you can follow through, and if you have time and energy left, you’re free to pull two more. I do this myself every day, and which two things I pick depends entirely on how much time and energy is left after my meetings. Some days that’s two things that take five minutes each. Other days it’s two things that take hours.
This is where defining “done” stops being tedious and starts being doable. You’re not writing a functional goal for an entire overwhelming list. You’re deciding it for two things, the same two things you already chose because they mattered. Before you start on either one, ask three quick questions: what does this actually need to accomplish, who is it for, and what tells me to stop. That’s a much smaller ask than defining done for everything you could possibly do this week, and it’s the version that actually holds up day after day.
Here’s what that looks like applied to a day’s two items.
If today’s list is “finish the report” and “fold the laundry,”
Done for the report might be: all required sections written, main points clear, sent by the deadline. Not polished, not perfectly formatted. Just that.
Done for the laundry might be: clean clothes in drawers, not necessarily folded a specific way.
Pick something observable, not a feeling, since the feeling of “finished enough” is exactly the part that doesn’t reliably show up for an ADHD brain.
Does it help to finish one task before starting another?
Yes, when it’s realistic. Finishing what you’re in reduces how many open loops are competing for your attention, and it builds real evidence that your own definition of done is something you can actually reach.
ADHD brains are drawn toward the next new thing before the current one is finished. That’s not a discipline failure, it’s a novelty pull, and every task left half-done becomes one more open loop pulling at your attention later. Once you’ve decided a specific, observable done for a task, practice actually getting there before you let yourself start the next one, on the tasks where that’s realistic. Some days and some tasks won’t allow it, and that’s fine. The point isn’t a rule to follow perfectly. It’s a skill to practice on purpose, the same way defining done is a skill to practice on purpose. This is part of why keeping today’s list to two items works so well. Two things are small enough to actually finish before something new pulls your attention away.
What about all-or-nothing thinking?
All-or-nothing thinking treats a partial version of a task as equivalent to not doing it at all, when a partial version is almost always worth more than nothing.
A kitchen that’s half cleared is genuinely cleaner than one that was never touched. A report with three of five sections written is real progress toward a report with five. Once you’ve defined done in advance using something specific and observable, a partial result stops reading as failure and starts reading as data: you got this far, and now you know what’s actually left, instead of feeling vaguely behind on the whole thing. I’ve written more about breaking this pattern in Finding Middle Ground if you want a fuller look at it.
The bottom line
Tasks stay open when done was never defined, not because you didn’t try hard enough. Most of your life handed you an external definition of done, and adult life mostly stops doing that, which means the skill of setting your own finish line has to be built on purpose. Borrow the way clinicians write functional goals: describe what the task actually needs to accomplish, for whom, and what specific, observable signal tells you to stop. Do it for a small, chosen number of tasks each day, like a 2-do list pulled from a bigger weekly menu, rather than trying to define done for everything at once. Decide it before you start, not while you’re already in the middle of negotiating with yourself.
Try this
Tomorrow, pull just two proactive tasks off your list instead of working from the whole thing. Before you start either one, decide out loud or on paper what done looks like for that one task today: what it needs to accomplish, who it’s for, and what tells you to stop. Notice whether having both pieces, the short list and the specific done, changes how the day feels.
A few common questions
How do I stop being a perfectionist with ADHD?
Perfectionism eases when there’s a clear, specific definition of “done” decided in advance, since there’s no longer an open-ended standard to keep chasing. For a deeper look at front-end and back-end perfectionism specifically, see this post.
Why do I never feel like I’ve finished anything?
Often because the finish line was never defined as something specific and observable. A feeling of “finished enough” is unreliable for an ADHD brain, so tasks stay open when the endpoint depends on that feeling ever arriving.
What is a functional definition of “done”?
A specific, observable description of what a task needs to accomplish for the person doing it, written before the task starts, rather than an abstract standard like “perfect” or “as good as it can be.”
How many tasks should I put on my to-do list each day?
Two, chosen with intention rather than however many fit on the page. Keep everything else on a separate weekly brain dump you pull from, not a daily plan you’re measured against. Two proactive, important tasks a day is small enough to actually finish, and finishing is what builds the momentum a long list rarely gives you.
Is all-or-nothing thinking part of ADHD?
It shows up frequently alongside ADHD and perfectionism, though it isn’t unique to ADHD. It tends to ease with the same tool that helps perfectionism: a specific, decided-in-advance definition of what counts as enough.
Executive Functioning and ADHD Coaching
I'm an ADHD and executive function coach and a certified organizational specialist, trained in Solution-Focused Brief Therapy and the Seeing My Time executive functioning curriculum. For five years I worked as a speech-language pathologist in adult medical rehabilitation, providing cognitive communication therapy. That background is what I bring to coaching.
Coaching happens online, which most of my clients prefer for the convenience and the privacy. Wherever you are, we can work together.
All services provided by Suzy Carbrey LLC are coaching, not clinical evaluation or treatment. I am a licensed speech-language pathologist, and that background shapes how I coach, but coaching is not speech therapy. If you're looking for a formal evaluation or treatment, let me know and I can refer you to a qualified clinician.