Believe it or not, I've had a few rooms in San Francisco with no closets. Now that I have a decent-sized closet, I make sure to maximize that space--and you should do the same. Hanging shoe racks, though precarious, save floor space for lesser-used items
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.