An inherent downside to laptop computers is their requisite placement atop a lap, table or seat-tray tends to impede the air flow necessary to keeping them cool and running well.
From the no-brainer files comes LapWorks Laptop Legs, essentially stick-on kick-stands for your laptop computer than not only fold down to prop up your portable PC or MacBook (for which they're called "MacFeet" -- ain't that cute?), but also cocking the keyboard to a more finger-friendly angle.
Not much to it, not much more to say, except they're way cool.