In The Creative Brain (Netflix) Animator Phil Tippett shows the ideas scrapbooks he curates that he can then revisit when he needs inspiration:
These are a series of books I put together … This was a thing I came up with to just, kinda, break what I was thinking.
I would just randomly cut out these pictures and just glue them into this book and then [when you flick through them] you’ll see like a feeling, or you’ll feel something, that’s like: I got it! I totally got it!