Since I'm really big on utilizing paper scraps, I thought I'd mention using them for simple Christmas trees for cards (I know... we're still in August, but sometimes you really do have to start working on Christmas cards early).
Dig through your scrap pile and find a piece of paper that you like, cut 3 triangles and place one on top of the other to create your tree. Cut a rectangle from another piece of scrap to create your base, set it in place and you're done.