How To Overcome The “One More Thing” Trap

Have you ever found yourself wrapping up a meeting, about to leave the office, or finishing a project when the thought creeps in: “I’ll just do one more thing”?

It sounds harmless, or even hyperproductive. 

But for many professionals, especially those with perfectionistic tendencies or ADHD, this habit quietly drains energy, fuels stress, and erodes credibility. Those few extra minutes can snowball into lateness, burnout, or the perception that your time—and everyone else’s—has no clear boundaries.

When “Just One More Thing” Becomes a Pattern

One of my coachees noticed that even after learning to manage his stress and embrace discomfort, he kept running late to meetings. Each time, the reason was just finishing one more email, clarifying one more point, or adding one more slide. Because, why not? Over time, he realized this pattern stemmed from his desire for perfection, as adding one more thing or asking one more question would make it even better. His mind stayed hooked on completion, tempted by the desire to do a little more, making it difficult to stop, even when he knew it was time to move on.

Why “Just One More Thing” Happens

1. Perfectionism in Disguise
 Perfectionists fear missing something important or leaving things “unfinished.” The brain treats stopping as failure, so they keep tweaking, refining, or overexplaining, ironically reducing efficiency and confidence over time.

2. ADHD and Hyperfocus
 For many with ADHD, the brain struggles to transition between tasks. Once in hyper flow, it’s hard to stop, even when time is up. They can’t even listen to an alarm or a reminder; they may even see it and close it without blinking. The reward system favors novelty and completion, so adding “just one more thing” feels satisfying in the moment but disruptive later.

3. Productive Procrastination
 For some, “just one more thing” is a delay or procrastination tactic. It gives the illusion of productivity while avoiding something uncomfortable, like making a decision, ending a meeting, or facing silence.

The Ripple Effect on Teams and Careers

Over time, that “one more thing” habit can lead to chronic lateness, burnout, and the perception that you don’t value others’ priorities. You might notice coworkers growing frustrated, meetings running over, or partners getting tired of waiting for you to wrap up. What begins as dedication can easily be misread as poor time management, or even a lack of trust.

How to Break the “One More Thing” Habit

1. Set Time Agreements
 

At the start of a meeting, state when it will end, and stick to it. Consistency builds credibility and a culture of respect. If you struggle with this, ask colleagues to assist, perhaps by appointing a timekeeper or setting an alarm for five minutes before and at the conclusion of the meeting.

2. Use Transition Cues
 

Create signals to close your focus loop: a timer, a closing phrase (“Let’s pause here”), or even shutting your notebook. 

3. Save It for Later
 

Keep a “parking lot” list for follow-ups or next-meeting agendas; not all topics need to be discussed online during that meeting. You can finish the meeting on time as long as you acknowledge there are topics still to be discussed and you share them with your team.

4. Be Realistic
 

Last but not least, before saying yes or adding more, ask yourself how long it will actually take to do that one more thing. In most cases, we just underestimate the time it will take to do that one more thing. Is it really just one more minute? Just observe yourself next time you “check one more email” and see how long it actually takes. By being more aware of the total time everything takes, from opening the email to thinking what to say, replying, and probably even getting a response or seeing other notifications coming up. How long does it really take? 

5. Timebox it

If you tend to lose track of time, experiment with timeboxing, allocating fixed blocks of time for specific tasks. When the timer rings, stop, reflect, and decide consciously whether to continue or move on. This helps you finish with intention instead of impulse.

And if planning feels like “one more thing” to do, start with an automatic planner. For example, Sunsama planner now offers an option to automatically timebox your day, helping you stay realistic about your workload and end on time.

Resisting “just one more thing” doesn’t mean you care less; it means you are committing to your deadlines, or what I call timeboxes. That is, if you plan to finish at 5 pm, or spend one hour on this task, stick to it. Recognize the temptation to do a bit more, but stop right there, and write down what else could be missing. You can evaluate those notes later and define if you actually need another timebox to do them, let them go as is, or delegate to someone else to follow up.
 Knowing when to stop is not a weakness; it’s a mark of maturity and self-awareness. Sometimes the best next step is to pause and move on to the next task.

If you’d like to go deeper on how to design your day with intention, check out my book Timebox: Time Management Strategies to Balance Productivity and Well-Being.