I try to challenge myself on every quilt I make. I try a new pattern first off. I love logcabin patterns and there are a slew of them out there in various shapes. Set-in seams are one of the challenges I tried on a diamond logcabin and found once you figure them out, they're not as hard as you once thought.
I love paper piecing but it seems a long time between doing them so I have to re-learn how to do them each time.