There's nothing quite like a whiteboard for quickly coming up with ideas — they're easy to write on, and let you erase or change things on a whim without wasting a bunch of paper. But whiteboards aren't portable, giving them a distinct disadvantage when compared to paper. With the Wipebook ($25 and up), you get all the advantages of a whiteboard with all the portability of a standard notebook, making it the perfect tool for coming up with great ideas. It has a smooth surface that feels great when you write, but it won't ghost like most dry erase surfaces. It's also easy to erase, but not too easy, so you don't need to worry about smudging your work. Each one comes with 25 double-sided pages, perfect for storing all your ideas.