I have 2 notebooks. One is spiral and perferated. I keep this one next to my mousepad for easy jotting. As I fill the pages, I move them to my 3' D-ring. Not as fancy as printing and scrapbooking, but works for me.
Oh, I also keep unlined and graph paper handy.
Oh -again- I also keep Post-Its handy for little reminders that I want to incorporate into my flow. For example, I have the hardest time remembering that raising saturation can fix a certain kind of bad photograph. Until I can remember without looking, that little Post-It is stuck to the corner of my monitor.