As a graphic design student, I take my laptop with me everywhere. After using my laptop for awhile I decide it was getting too hot, so I went out and bought a laptop stand with fans built in. This is great for when I used my laptop at home, but doesn't help at all when I take it out of my home. The AviiQ portable aluminum stand is perfect for someone like me. It folds down to a small flat panel and when you want to use it, you simply fold it out and place your laptop on top of it.

http://s3files.core77.com/blog/images/2009/11/0aviiq.jpg