Is a matte finish better than glossy? How to compare processors? What are the VGA, DVI, HDMI ports for?
Microsoft's has some useful tips, answers & facts on laptops that can help you make a good purchase.
If you are a power user constantly on the move, get a laptop with a 14 inch or lower screen size.
Smaller screens .. tend to use less power, so you'll gain battery life and reduce the need to pack a power cord for jaunts to the coffee shop, further lightening your load.