Why buy the usual stack of Post-Its when you can get Resketch's Notepad and save the environment a bit? Each stack has 175 3x3 sheets, and it's important to know that, unlike Post-Its, there's no adhesive—don't buy these if you plan to stick notes all over your desk or wall. Instead, the entire stack is made from reclaimed paper sourced in the US; you can easily tear off a piece to write on it. As you flip through the pad, you'll notice some sheets are lined, and some are colorful—each stack is unique.
If the Notepad isn't for you, but you like Resketch's ethos, you can opt for standard notebooks, reporter-style handbooks, and even journals. I also quite like the company's Hex Pencil, if you prefer a pencil over a pen.