I buy a number of things based solely on my intentions for them. Today I bought a small, pocket-sized, quadrille-lined notebook, Moleskine (Mol-skin-a), to write down ideas and keep track of things. This is despite the fact that I have at least 2-3 other half-filled pocket sized notebooks. The Moleskine has some features that make it different: an elastic band to keep the book closed, a cloth ribbon to mark your place, and a hidden pocket on the back inside cover. They run about 10$ for the pocket sized ones, and you can buy them at most book stores. See the different styles here.