I started with one of those reusable screen protectors, they are a little bit thicker and stiffer than the use-once ones I use on my Palm. Had to get rid of it right away, the screen on the N800 seems to be too soft for the reusable screen protectors -- there were about a hundred small bubbles which wouldn't go away. Removed the protector, been happy since. Everything that looked like scratches turned out to be smudges, they go away with careful (think optical mirror cleaning) appliance of cotton, lukewarm water and soap.