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Aside from being treated like a basketball, the biggest laptop killer is heat. Clean the vents. Tell people that laptop does not literally mean to put it on their laps, which generally blocks vents and causes overheating. Baby the battery a little. If they are plugged in all the time, either make sure that laptop has a power management system that incorporates a power scheme for that, pull the battery, or unplug it occasionally and use it on the battery down to the low charge warning. The last bit may be a touch of snake oil, but it seems that I have had the longest battery life when I do it. Fortunately, most laptops come with better power management than they did 5+ years ago.