Get it all on one page
When I’m struggling to solve a problem, particularly with designing an app, I find it helpful to get everything onto a single page. My notes, screenshots, sketches, designs, references, inspiration, all of it. Lay it out on a canvas and just look at everything together.
Then, bit by bit, I start to cross items out in red, and when I don’t need a something I move it to an area of the board marked “Archive”. The rest stays in an “Active” area.
That’s it, that’s all everything I need to figure out a project.