I try to keep my eyes open for good lengths (2-3m) of quilting fabric at thrift stores (where I do much of my fabric shopping due to budget constraints). Sometimes I've been lucky enough to find a piece that could be a good fit for a number of different colourways/quilt types. I have a couple of pieces right now that might even inspire what I do on the front - we'll see once I've cleared out some of the WIPs first...