Save the bookmarks and gps info onto a card or a file on your computer.
You'll need linux and a connector cable.
Several months ago Nokia came out with an OS, etc. update to the n800. I updated and then realized that I had wiped my bookmarks, GPS favorites, and any other file that was on the tablets internal memory - how do I avoid this with the next couple updates?
I'd especially like to get the Nokia n810 update to make the n800 video playback much smoother.