The daily wear is where most damage happens. In spring, you're probably wearing it more often because it's breathable. But sweat and heat are the enemies. Here's what I've seen go wrong with first-time buyers:

• Tossing it in with a heavy load—denim, towels—causes friction that pills the fabric.
• Using hot water to "get it cleaner" actually sets stains and shrinks the cotton.
• Hanging it on a wire hanger after a sweaty day stretches the shoulders.

A quick routine: after wearing, don't leave it crumpled in a hamper. Hang it in a well-ventilated spot to air out before washing. That cuts down on odor and lets the fibers relax.