One of the simplest things to remember is chew your food thoroughly. So many people wolf down their meals like there's no tomorrow. The simplest thing to remember is the longer you chew, the sooner your brain will indicate the "full feeling." 

From the AMA daily email:

Devices, apps help people eat more slowly by chewing longer.

On the front of its Personal Journal section, the Wall Street Journal (8/12, D1, Reddy, Subscription Publication) reports on new medical devices and applications designed to help people eat more slowly by chewing longer. Chewing food thoroughly appears to make people feel fuller sooner, and some studies indicate that people who chew their food the most may consume fewer calories. One group of researchers is using funding from the National Institutes of Health to design a study which will test the efficacy of a diet in which participants will be restricted to just 100 bites of food on a daily basis.