I've been all about this small notebook lately. It's nice to:
1) Write/draw thoughts out physically 2) Not have to get a phone involved whenever I want to remember something or think it through.
Unfortunately, I lost mine last week. I was cool with it because I think I remember most of what was in there, but there were also checklists in there. Checklists with things I have since done and could be ✔︎ing off!