When I'm doing labor-intensive tasks on my MacBook, like editing high-resolution photos or videos, it tends to overheat. One of the best ways to combat this problem is to allow air to flow underneath the unit to keep it cool. There are laptop accessories you can buy like elevated lap desks and fans, but they aren't very portable, and they can be pricey. My solution: two halves of a racquetball. Super cheap! Super portable!