Instead of sipping artificially flavored coffees, make custom, naturally flavored coffees yourself. Grind whole-bean, organic coffee right at home and add cinnamon sticks, chili peppers and cocoa nibs for added flavor. A little goes a long way, so be conservative when adding flavor.
Transform a little-used wall into a functional message center. For your home office, paint the inside of a closet door or a small wall using chalkboard paint; it's a nontoxic latex paint mixed with carbon (which allows you to write on it with chalk), and it is sold in most home improvement stores. Slather two coats of paint on whatever you want to make into a chalkboard. Then jot down your ideas, reminders and messages on the board.