Laptops can get very hot sitting on a desk all day. You don't really need much elevation, just enough for the air to circulate. There are a lot of laptop stands available for about $30. That's not too expensive, but why put out the money for a ready-made product that you can hack together on your own? All you need is 4 binder clips, 4 sheets of paper and 10 minutes
If you need a quick fix, this is it. He shows you how to hack together a mini and full elevation. You're laptop will run cooler and you will have saved $30.