Open Question: How to take care of my Laptop?

Ok, i have a Toshiba Satellite L500D/00V. I want to take good care of it as it has to last me 5 years. I hear that they have a known history for overheating after a yeah or so. So how do i prevent: -Overheating (always used on flat surface) -Bad battery wear -Keyboard wear -Paint wear (my last laptop has 2 black spots from where my wrists would sit) And any other advice would be greatly appreciated! Thanks.