Originally Posted by
samanime
A lot of people have been suggesting a white sheet, but I actually recommend getting a green or blue screen (like they use for movies), and then removing those back drops with Photoshop (or After Effects is even a little better).
Also, try to get a really strong ambient light, but set it far away from the object you are shooting, so it is bright without having any light points. Something like a lamp with an 80+ watt bulb standing behind you and off to one side is a good start. You need to be more careful with the lighting if what you are taking a picture of is overly reflective.
Also, take LOTS of pictures, especially if you are using a digital camera. Take them at the highest resolution and take lots of them. Then you can go through them and pick the best one(s). Then remove the back drop with image-editing software, then crop it down to the size you require.