|5.5 x 3.5", in the Tiny Moleskine Sketchbook.|
If I have ten minutes because a friend is running late, or I'm waiting for them to finish changing the oil in my truck, or I got there early and the store isn't quite open yet -- I have a ballpoint pen, a pencil or two, and my Tiny Moleskine Book. I can be joyful and creative instead of bored and impatient.
I recommend this, even if you think you can't draw (link goes to a piece by Roger Ebert, with whom I often disagree but who I will always love for this post alone; thanks, Roger). If you write, carry one with ruled pages. Or a little MP3 recorder. If you cross-stitch, keep a small project on hand. Jokingly I call my portable art supplies my Boredom Prevention Kit, and it is, but it's more than that. It's something to remind you that you are who you are.