Another way of giving variety to your shots is by using different colored backgrounds. I use it all the time and I love them.
For product shots or for something small, you can use pieces of colored paper that you can buy in craft stores, instead of buying those paper backgrounds that cost around 60 bucks a roll at camera shops. If you run out of room for the colored background in your shot, you can always clone that area using photoshop or a similar program.
One useful tip, use a spot light or a snoot to highlight parts of your background so it does not look flat. Also, with colored backgrounds, there is a big chance that your white balance will be thrown off. Make sure you use a grey card, or use your cameras manual white balance setting.