Here's some information on the basics of portion control from MedHelp.org and the Sugar Sense app. You can find this in the app by clicking the menu bar in the upper left and selecting Health Guide, then navigating to the Eat Right section.
http://www.medhelp.org/diabetes/articles/The-Basics-of-Portion-Control/1778
Hi, you reduce your starchy carbs and replace with plenty of non starchy carbs, healthy fats, and things like soup which are filling but lower calorie.