I tend to bounce between sketchbooks repeatedly. Ones with fancy paper, one's that are massive, moleskins, and so on. I even keep a backup one in the car. I also got in the habit of trying to use notebooks again, taking notes and doodling. My favorite one I pumped full of awesome notes and doodles from art and music workshops and then proceeded to lose it for about a year. Fortunately it finally turned up again in a random backpack, and I found this doodle I always rather liked. It's always a bit of a pain getting the loose-leaf lines out of these though.