I watch all the online shops for sales, check for coupons, check consignments shops, yard sales, swap with friends.
Fabric.com
Hancocks of Paducha.com
Quiltfabriccloseouts.com
equilter.com
thecleverquilter.com
AAAQuilter's Supply.com
www.summerscountryquilts.com
These are just a few that I check regularly.