Starr loves this robin's-egg-blue storage box from IKEA because its clear front panel makes it easy to see what's inside. Covered boxes, like this orange hatbox from Stray Dog Imports, are great for more personal items. Both are stacked on an Elfa shelving unit, which can be customized to fit your space, from the Container Store.
Weed Out: Before you even start to tackle the what-goes-where piece of the organization puzzle, cast a critical eye on your stuff. If your closet is packed with out-of-date or ill-fitting clothes, be ruthless and start filling bags to donate.