ConceptD 3 heats up quick!

Hello there!  I love my ConceptD3, it runs like a champ, however it tends to heat up in a hurry.  I suspect it's my wooden desk that I'm using, but I'm not sure.  Any wisdom on how I can keep this laptop cool would be appreciated.  I'm thinking about maybe getting a cooling a mat for it, but not sure. Thank you very much.