I've been gearing up for the summer painting season by prepping boards to paint on. Basically cut-to-size compressed high density fiberboard, a.k.a. hardboard (similar to "masonite"; which the original Masonite Corporation no longer manufactures) coated with several layers of acrylic gesso. You wipe the boards down and lightly sand them with medium grit sandpaper, paint on a layer, let it dry for at least four hours, sand to smooth out the raised brush marks...then repeat the process, adding at least three layers before letting it dry overall for a few days. A bit more involved than buying pre-made canvas boards, but I'm really getting into the unique textures that I get via this method -- as well as the fact that it's a tad less expensive this way. Also, there's something therapeutic about painting multiple panels of white, pristine emptiness.