One of the best things I found for protecting my mp3 and camera from scratches is a sock. 100% cotton sock. Baby Socks seem to be the best size, nice and snug. You can use a plain white or fancy print socks. I use a 100% cotton white sock most of the time for carrying my phone in. It's also great for wiping off smudges, dirt, or whatever ends up on my phone.
Wow, I hope your not to exhausted from all the work from this instructable.