The light diffuser box is the easiest thing in the world. I did a cardboard one like Dan described, with tissue paper over the three holes and three of those clip lamps.

Just play around with the position of the lights to get all your sides lit how you like them - move them farther away or closer, etc. You can also hold a piece of white paper between light source and subject to help cut down glare if you need to. I had a cheap DSLR and got some pretty cool pictures even as a total amateur.

Play around with your backgrounds, and if you can get even a cheap tripod I would. They help a TON.