You've been there before, it's familiar: the soiled smell, dust that makes you sneeze, and piles of awful clothes. I'm talking about the thrift store. With a little patience (and good luck) anyone can come-up on a thrift store treasure. This method is much like your folks' closet, except the thrift store is a less personal way to score second-hand goods. If you play your cards right, you'll have more Made in USA Brooks Brothers oxford-cloth button-button down shirts, L.L. Bean flannels, and Goodyear-welted shoes than you could possibly ever purchase (at full-price).
Take this advice: the "better" neighborhoods that you thrift in, the better the outcomes usually are. Richer folks tend to give up nicer clothes more frequently, and you can come become the most stylish broke dude around in no time.