To quickly jot down a thought for later, I use 2Do (runs on all my devices). That's as small an overhead as I can get in my digital world. Every once in a while

To quickly jot down a thought for later, I use 2Do (runs on all my devices). That's as small an overhead as I can get in my digital world. Every once in a while I review what landed in my inbox and move the ideas to a different list, rewriting and expanding their descriptions. To sketch things, I use the Concepts app on my iPad. Once you get used to the convenience of drawing something, then circling it with your finger and moving it to the side, it's difficult to go back to paper. Highly recommended. I do a lot of drawing/sketching, it helps me think (even though I can't really draw, my drawings are really just a bunch of text with arrows). Then once a year or so I review all my oh-so-creative thoughts turned into notes and I realize with sadness that I had no time to do anything about any of them.