Where I am (Boise), the weather is starting to change -- albeit slowly. Still, I've found myself digging in my closet for clothes that aren't quite so warm.
It can be tempting, as temperatures start to rise, to zip to the mall or a store and grab a few new t-shirts, a cute skirt, maybe even some new flip-flops. Be careful, however; even $15 or $20 spent on clothes can throw your budget out of balance.
Instead, consider asking some friends -- say, 6 -- to grab 3 summer or spring items they don't want anymore and head to your place. With 6 friends (plus you) bringing 3 items, you'll have over 20 pieces of clothes in your place. Once everyone has arrived, make something fun to drink (pink lemonade? smoothies?) and take turns picking out something new. If everyone takes a turn, people will leave without the 3 things they didn't want and with 3 "new" items. It's a great way to get some new clothes, hang out and catch up with friends, and, best of all, do it all without spending a penny (other than on the lemonade, of course!)
(Here on the About.com College Life blog, every Thursday is "Thrifty Thursday." I'll post a tip each week about how to save money while you're in school. It might be something big; it might be something small. But given how important each nickel is, each little tip adds up, right?)