When I researched laptops about a year ago, there were basically two types of screen:-
i) TFT - more expensive, but with better brightness, definition and a wider 'angle of view'.
ii) HPA - more common (then) on cheaper laptops.
Unless light weight and small size are very critical to your needs for portability, look for a screen with the largest viewable area. Screen dimensions quoted by manufacturers can sometimes be deceptive. Laptop screens in general, although designed for the job, should be treated with care.
Pointing Devices (mentioned by StickyB):-
I also prefer the Toshiba type 'nipple', but don't forget that a conventional mouse can easily be plugged in to a laptop for home and office use. (Sorry if this is too obvious).
After care:-
Toshiba Support were very helpful on the two occassions I contacted them with minor problems.
The extended warranties vigorously promoted by retailers on laptops is another minefield.
Good Luck
Edit:- Written before I had read Evo7's post, so I apologise for any repetition.
[ 31 October 2001: Message edited by: spekesoftly ]