When I'm downloading large files (such as movies) where an extra 5-20 kb/s would mean a ton of less downloading time, I usually go in my options and set my upload slots for 0. I find uploading really screws around with my bandwidth....then, after I've downloaded whatever it is, I'll switch my uploads back up and just leave my computer on for a while to share it around. I find that works best to keep my downlaods fast and my share ratio up (which I still can't find out how to check >.>)