This is posted in the REviewers Academy but I figured I'd share here as well.
All the pictures in my reviews were taken in this little guy.
It is comprised of 4 pieces of foam board, so it's sturdy and white. I then cut a hole in each side, slightly smaller than a standard sheet of paper, then I cover the hole with a piece of white paper, and then i use two shop lights(not the best choice). If you are buying new lights, I suggest whiterlights like regular lamps, I just happen to have these sitting around and they make my photos very yellow at times but I edit that out. A regular lamp witha pure white bulb would make your editing process easier.
Then always remember to use your flash even with the lights. I use a DSLR camera with a high powered Nikon speedlight which I usually point upwards and bounce the light off of the white ceiling in my lightbox to create a more natural feel. The two lamps provide side coverage and fills everything in.
I hope this helps someone, feel free to ask me any questions.