Periodically, it is a good idea to clean out the inside of your computer. Doing so prevents dust from building up on your components which acts as an insulator to bottle in heat. There are many different ways to go about cleaning your computer (for example, see this article), but personally, I just do the basics which involves:

• Blowing out the inside of the case with compressed air.
• Wiping the case (not the components!) with a slightly damp cloth.
• Making sure all the connections and plugs are tight.

Of course, before you do any of this, you should take your computer outside (you don’t want to get dust everywhere after all) and make sure you ground yourself before opening your computer.

It takes about 10-15 minutes and I do this about every 6 months, give or take.