Many of your best ideas are ideas you’ve already had
You just have to revisit them! And using spaced repetition (with or without flashcards) is a way to incrementally revisit notes and ideas.
Many great artists, designers, scientists and other successful people build libraries, personal museums or catalogues of work they can revisit and reuse later.
It is important to harness ideas and creativity when you’re in a good flow, and draw on this resource at a later date.
It means you’re able to start something new without ‘a blank sheet of paper’ whenever, however you feel.
References
See M/M Paris, Prince
See Think Better with the Graph View (YouTube), Note taking and note making