There was a group on here doing the quilt challenge book that Parerprincess mentioned. Maybe you could get some ideas there. Maybe last year, I can't remember when it was. This year my guild did a challenge where you made a wall hanging inspired by a favorite greeting card. I am working on it now. Not too sure I like how it is coming out. Another challenge we did was everyone got a half of a FQ of some ugly fabric and had to use at least half of it in a wall hanging. At first some members insisted I didn't use enough in mine, I used some of the back of the ugly fabric. Last year the challenge was to make a snowman, it didn't have to be a quilt or even made of fabric.