Building an infinite backdrop
You know those apple commercials where the guys are standing on a white background and it seems to go on forever? I'll bet you thought that was a tough thing to set up or that you had to have a fancy set and alot of fancy lighting, but you don't.
If you have a backdrop stand you can simply buy a roll of Savage Background Paper in whatever color you want or if you have a smaller budget and a smaller subject you can simply drape a sheet over a curtain rod so that it covers the ground and creates a smooth curve before going vertical as high as you need it to go. The benefit to the paper is that you can get some really cool colors, it is reusable until it gets too much abuse and you can trim it down until you run out of paper. Yes the rolls cost about $50-$150 depending on how big a roll you buy but they are very easy to use and very easy to store.
The only other trick you need to know is how to set up your lighting. What you want to avoid is creating any shadows that might give away how deep your background is. There are a few methods to doing this and the simpleist is to use two lights. One at your left and one on your right so that each light will cancel out the shadow cast by the opposing light.
If you want to eliminate the shadows even more you can place two more lights at the right and left of the backdrop itself and aim them at the backdrop behind the subject. These are meant to illuminate the backdrop only and also to blow out any shadows that may be caused by your primary lights so they don't have to be very hot.
If you are using a sheet or some other translucent material you can also put a light behind the backdrop to illuminate it form the back. If you do this then you can get away with only using one light behind your camera so by using the cheeper backdrop option you also get to save a few bucks on your lighting!
The infinite backdrop setup is perfect for photos where you want to be able to cut people or objects out in Photoshop or for photos where you want to show off only the items in the photo. If you ever go on eBay you've seen items photographed this way and it makes them stand out over the items that are on someone's counter top. It's a simple setup and will give you very consistant lighting for your entire shoot. Another benefit is that you can use constant light sources for this setup in case you don't have a way to use multiple strobes.