Got your pencil?

My friend Derek sent me a link to the Pencil Revolution blog today. It's cute and silly, and occasionally even serious, but mostly it reminded me about a tip I learned from Twyla Tharp's book The Creative Habit. Namely, that you should always have your pencil with you...whatever your pencil happens to be. For me, it's actually my camera :-)

What's your pencil? What should you never leave your home without?