I agree with Z. Stretching causes more damage and interestingly enough is the opposite of compression. Use a large ace bandaid to wrap it. Get the ones that are self sticking. Dont warp too tight. It should be at a compression level where you can sleep the whole night with it on. Dont make it too light either! Makes a big difference by morning.
I have a thin neoprene one that works really well. something like this :
http://www.medco-athletics.com/images/products/975...
They do tend to slide down. the ones lined with fabric dont slide down as much. You might find one at Models or even the local CVS.