Well my gal and I are painting a mural on my wall. We're going to get about 10-15 16x20 canvases, then hang them on the wall in a grid like pattern with about 2 inches between each. Then we'll run masking tape in all sorts of directions across the canvas', and paint the spaces that the masking tape doesn't cover. Then remove the masking tape, and VOILA! art!... or at least I hope. Anywho, just giving you an idea for something to do, even if it is by yourself
Or go get Halo2 and play that all day
