iPhone Paperback Notes
With iPhone Paperback Notes ($8), you can take notes on the back of something you always have with you, your phone. Of course your phone already has a notepad app, but there's something to be said about actually hand-writing a list. Each paper note has removable adhesive on its back, letting you stick it to the back of your phone, refrigerator, computer monitor, or other surface. Grab a stack of notes and keep them with your phone, or just stick one on the back for your to-do list or grocery list.