I carry a Mead memo book and a pen in my back pocket at all time, it's great for taking notes, recording stuff I don't want to forget, doodling, etc..
Added bonus: I can take it out to write a to-do and not accidently spend 20 minutes on Twitter or HN. Beats any other productivity app I ever tried in that regard.
After having a mead go through the laundry, I switched to a rite-in-the-rain with a fisher. The notebook can survive 2-3 trips through the laundry before it becomes hard to read.
Added bonus: I can take it out to write a to-do and not accidently spend 20 minutes on Twitter or HN. Beats any other productivity app I ever tried in that regard.