Do you get enough fiber?  Chances are you don't.  We need about 25-30 grams of good quality fiber daily.  Some of the benefits of fiber include, making you feel fuller so you eat less, regulates blood sugar levels so you don't feel as hungry, binds onto carbohydrates in the gut and decreases the absorption of these carbohydrates so you get lower blood sugar levels, and cleans out the colon to keep your regular. 

Eat some apples, oat bran, veggies, legumes and whole grains to get good amounts of fiber daily.  When increasing the fiber in your diet make sure to do it slowly so you don't get a lot of gas, and digestive disturbances such as diarrhea or constipation.  Drink lots of water too!!