If you like working with sketches I encourage you to check out the My Favorite Thingsblog where a new one is posted each Wednesday. They are typically not super elaborate (like many of the others I've seen on various challenges and sites) which I find I enjoy. It leaves you a lot of room for creativity. You don't need to use MFT products to join in and their is a random drawing for a gift certificate each week too.
STAMPS: Vertical Greetings with Matching Die (MFT)
INKS: Kraft (MFT
PAPERS: Follow Your Heart (My Minds Eye), Boy Scouts Pad (K&Co.), Solids - Recollections (Michael's), Bazzill, MFT
DIES: Blueprints 1- Button, Mix-n-Match Banner (MFT)
PUNCHES; Notebook Edge (EK Success)
OTHER: Paper String (Tim Holtz)