I don't belong to a quild so I make my own challenges. Right now I'm collecting for the personal challenge I call the "Man Quilt". The quilt has to be made from 100% cotton men's shirts that I've acquired from garage sales and thrift stores.
I've also started one made of selvages sewn to adding machine tape but I'm using selvages from other people in addition to my own. DD and I are still deciding how to set them together, we've drawn out several different ideas.
Mostly I just like to look at pix of other quilts or quilt patterns and figure out how I can change it to make it my own.