Make a list or index of your quilting books and keep it always near, when you visit a quilt shop in person or online. This could prevent you from buying two of the same title, or two books on the same subject.
*This tip submitted by Nadine@Patchowl. Thanks Nadine!
For all the techie quilters, check out Library Thing, and scan your quilting books into your online Library. You can access it from home on your desktop computer or laptop, or even from the local quilt shop on your mobile phone! Adding a widget to your blog so that others can see what books you have in your library is easy too!