Put your folded items in the drawers "belly out" or "neck out," your choice. Then, when you return them to their place, slip 'em in the opposite way. Again, you'll quickly see in a few months what you're not wearing. Fairly painless but it only works if you actually fold your clothes before you put them away.
[Image: J. Crew] (Oh, and by the way, if you're in the market for a cashmere sweater, J. Crew's got some of the best, loomed by Italy's Loro Piana mill)