My storage space is limited to two kitchen-sized cupboards so I buy in small amounts rather than yardages. I only buy large yardage amounts if it's for a specific project, usually for the borders or backing. Although they're more expensive than off the bolt, I tend to buy fat quarters so that I can have lots of variety but still not overflow my space limitations. And I keep a small box for scraps so I can use them for scrappy things or applique pieces.