To-Do List or Idea List? How to Place Something You’re Not Sure You’ll Do
If you’re unsure whether you want to do something, don’t turn it into a task just because it crossed your mind. Put it on an idea list while you’re still deciding; move it to your to-do list when you’ve chosen to act and can name a next step. If it depends on a date or someone else, record that trigger too. This keeps a possibility visible without making it feel like a promise.
The key question: Have you made a commitment?
A to-do list is useful for actions you intend to take. An idea list is for possibilities you want to remember without deciding yet. The distinction is commitment, not importance or ambition: a weekend trip could be either, depending on whether you’ve decided to plan it.
This matches the steps in [Getting Things Done’s overview](https://gettingthingsdone.com/what-is-gtd/): capture what has your attention, clarify whether it is actionable, and put reminders where they belong. The method distinguishes deciding what something means from simply recording it. The choice below is a practical way to apply that distinction to uncertain plans; it is not a rule that every list system must use.
Use this four-step decision process
**1. State the item as a possibility.** Write a short, neutral phrase: “Take a pottery class,” “Look into cycling to work,” or “Replace the hallway lamp.” Avoid wording it as a task—“Book a class”—if you have not decided to book one. Task-like wording can make an undecided option look like a commitment.
**2. Ask whether you’ve chosen an outcome.** Are you willing to spend time or effort to make this happen? If yes, it belongs on your to-do list. If you’re still weighing whether it appeals to you, belongs in your life, or is worth the effort, keep it on your idea list. “I should” and “that sounds interesting” are not decisions by themselves.
**3. Check whether anything is already owed.** An unresolved idea can contain a real commitment. If you promised someone you would send a proposal, send a reply, or make a reservation, record the action you owe even if you’re uncertain about the larger plan. Keep the broader choice separate: for example, “Reply to Maya by Thursday about the trip” can be a task while “Take a trip together” remains an idea. This prevents uncertainty about the whole plan from hiding an action you have already agreed to take.
**4. Give the item a next step or a review trigger.** For a task, write the next visible action: “Compare class schedules” is clearer than “Pottery.” If you are not ready to commit, add a useful cue to the idea instead: “Revisit after checking the class schedule,” or “Ask Sam what the weekend dates are.” A cue is not a promise to pursue the idea; it tells you what information or moment could help you decide.
Where common uncertain items belong
**You have decided to act:** Keep a visible next action on the to-do list, such as “Email the studio about beginner classes.”
**You might do it but have not chosen:** Keep the possibility on the idea list, such as “Try a beginner pottery class.”
**You need information to choose:** Keep the idea with a review cue, such as “Revisit the class after checking the evening schedule.”
**You owe a reply but are unsure about the larger plan:** Put the promised reply on the to-do list and the broader possibility on the idea list.
**You no longer want to revisit it:** Remove it rather than keeping an empty obligation.
These examples are a decision aid, not a claim that every item has one objectively correct category. Use the wording and reminder that will help you remember what you have and have not decided.
Make the idea list useful without turning it into a backlog
An idea list works best when its entries are easy to recognize and easy to reconsider. Capture the possibility in a few words, then add only the context needed to make a future decision: what you need to find out, who you might discuss it with, or when circumstances may change. “Maybe learn guitar” is hard to act on later; “Try a borrowed guitar for a week before buying one” makes the uncertainty more specific without committing you to a purchase.
Review ideas at a moment that fits their nature. A seasonal garden project could be revisited before planting season; a class idea might be revisited when registration opens. If there is no meaningful cue, you can check the list during a regular planning session. [Getting Things Done describes reviewing system contents as a recurring step](https://gettingthingsdone.com/what-is-gtd/), and its [Someday/Maybe discussion](https://gettingthingsdone.com/2023/06/the-someday-maybe-list/) connects this kind of holding space with keeping creative possibilities available. That source is a discussion of the method, not evidence that any particular review schedule suits everyone.
When you review an idea, make one of three choices: move it to the to-do list and name a next action; keep it as an idea with a better cue; or remove it because you no longer want to keep it in view. You do not need to defend an old possibility just because you wrote it down.
If you prefer a notebook, the official [Bullet Journal Future Log guide](https://bulletjournal.com/blogs/faq/how-to-make-a-future-log) also allows entries for things you may get around to someday and recommends reviewing the log. A separate idea list is this article’s simpler option when the possibility has no chosen month; you do not need both places for the same item.
A worked example: “Maybe start cycling to work”
Suppose the thought appeals to you, but you haven’t checked the route or decided that cycling fits your routine. Put “Maybe cycle to work” on the idea list. Add a cue such as “Check route and bike storage this weekend.” You’ve captured the possibility and identified what could inform your choice, but you have not promised yourself a new commute.
After checking, you may decide to try it. Now create a task for the next action, such as “Ask building management about bike storage.” If you decide against it, remove the idea. If you want to wait until the weather changes, keep it on the idea list and use that season as the review cue. Those are three legitimate outcomes; the list’s job is to preserve your choice, not push it toward action.
A quick rule for the moment you’re unsure
Ask: **“Have I chosen to do this, or do I only want to remember that it’s possible?”** If you’ve chosen, write the next action on your to-do list. If you only want to remember the possibility, put it on your idea list and add a cue if one would help. If another person is already counting on you, record the specific promise separately.
That small distinction keeps a to-do list about things you mean to do and gives uncertain ideas a place to wait until you’re ready to decide.