I used to start every project with a huge plan, now I just pick one small piece and do it.
For years, I'd try to write a whole novel outline before even starting chapter one, and I'd always quit. About six months ago, I decided to just write a single scene, maybe 500 words, about a character buying coffee. That turned into a full chapter. The change was realizing the big plan was the thing stopping me. Has anyone else found that starting super small actually gets you further?