RPG

I use the superior method, a mess of illegible scribblings in a journal. I am trying to get better about it, though. And one thing im really trying to do is focus my prep on what the region is like, and what the important actors there are doing, and not on what i think the players will do. Every time I try to predict the pc actions they completely flip my prep on its head, so I want to go for more of an "informed improv" type prep

Obsidian is a personal favorite.

I use Onenote, it's free. Let's you have a book with folders and pages. You can have blank lines dotted or graph paper. You can use it to search images uploaded to it. Combined with a surface pro to write on the screen I can do everything I want to from draw maps, edit character sheets and take notes. You can hyperlink between pages and print pdf's into it. Fabulous piece of software for RPGs.

@jursed I use Google Docs for just about everything. That way, I can call them up on any of my devices whenever I need them.