A plan moves when there's one step you can take next. It helps when that step is small enough to start, within your control, and tied to a moment you'll recognise.
Small enough to start
"Read more" is a goal; "leave the book by the bed" is a step. "Save for a repair" is a goal; "ask the shop for a quote" is a step. If a step feels too big to begin, the next step is usually a part of it.
Yours to take
A step that depends on someone else ("my manager approves the leave") isn't one you can take. The step that is yours is the one before it: "ask my manager on Monday". What they answer is a separate thing to record.
A moment you'll recognise
A time ("Tuesday after dinner") or a familiar moment ("when I sit down on the train") gives the step a place in the day. You choose it; nothing reminds you unless you ask it to.
In UpWill
Each plan shows its next step on its page. When you mark it done, "What's next?" offers steps to choose from, or your own words. A note can also suggest one ("Next I'll ask about the brakes"), and you decide whether to use it.