189573465538235769 Instead of throwing out old cereal boxes, use them to keep your desk drawers organized. You just cut them to whatever size you need and then you can cover them with wrapping paper to make them look like store bought organizers. This is a great idea for the bathroom cabinet as well.
Underwear drawer - Finally get around to compartmentalizing your underwear drawer. IKEA sells little organizer boxes. Filing your clothes and keeping them divided is especially helpful if you keep your underwear, socks, and tights all in the same drawer.