Make the next step smaller

A useful next step leaves something behind: a paragraph, a drawing, a question sent to someone who can answer it. “Work on the idea” leaves too much to decide when you finally sit down.
Consider the difference between starting a website and writing the first sentence someone will read on it. The website includes dozens of decisions. The sentence gives you one thing to inspect. Is it clear? Does it sound like you? Would someone know why they should keep reading?
That small piece can reveal what the larger project needs.
Small enough to finish, real enough to teach you
There is a trap here. Rearranging a task list can feel like progress because it is easy to complete. A useful small step touches the actual work. If you want to write, write a rough paragraph. If you want to build, make one part respond to an input.
Try ending a work session by leaving a specific instruction for the next one: “Rewrite the opening example so it fits in three sentences.” Tomorrow starts with a decision already made.
The larger ambition can stay large. The action in front of you only needs to be clear enough to do and substantial enough to learn from. That is also the point of thinking in models: reduce the thing until you can work with it.