Kosma Pawluczuk
Kosma Pawluczuk voted up Refreshme Refreshme's answer

Gently slow down your chewing. Actually put your eating utensil down between bites. This will slow you down, prevents you from mindlessly wolfing down your food and after 20 minutes it allows your brain to start registering that you are becoming full.

Besides that, sometimes when your food gets cold its not so appealing.