Grehlin, a gut hormone (produced in the stomach), has been identified as triggering hunger & promoting obesity. Grehlin levels rise to make us hungry at meal time and subside after eating.
One way to suppress grehlin levels is to eat a handful or
walnuts or
pine nuts about 30 minutes before a meal. The combination of protein & fiber along with some fat in these nuts will help to lower grehlin levels.
Brazil nuts,
almonds and other nuts can also be effective. However, I do not believe that chestnuts or peanuts (a lugume) are as effective as the other I've mentioned. For other grehlin countermeasures check out the
link above as well as the following one:
How to Outsmart the Hunger Hormone Grehlin
As others have already mentioned, it is also best to
eat slowly and chew thorougly. Granny was right -- you should chew yer food 20x per bite. Stop when you
think that you are 2/3 full, or 3/4 full. As WV & Rickson point out, it takes a while for your body to realize that it is already full.
I find that cold water helps quite a bit. It helps to reduce the craving for sweet high-calorie drinks like juices or soft-drinks. Note that drinking too much juice (or soda) will add to the calorie count much too easily -- it is very easy to consume a lot of calories w/o realizing it with liquids.
At the end of your meal, try some low-calorie foods like pickles or watermelon. Also avoid snakcing in front of the TV -- mindless eating while watching the tube is a great way to ingest too many calories.