i use these from best buy:
http://www.bestbuy.com/site/olspage....=1067391594749
they have gridlines on them so you can cut exactly how you want them.... then peel and put on your device. i use them on all my phones, gps units, and psp/ds. i used one on my mogul and left it on for a year. i recently had to send my mogul back to exchange it for the touch pro, so i peeled the screen protector off thinking it wouldn't be pretty cause i left it on for so long... but to my surprise it was flawless underneath. great screen protectors.
edit: oh and it peeled off with ease even after leaving it on for a year (and i used and abused my mogul every day)
if anyone has used these and know of any others that work like them or better please let me know... i'm always up to try something different.