5. Eat before you shop
You know what happens when you drop by the supermarket on your way home from work, famished—before you know it you’ve bought the biggest tray of cannelloni ever made. The worst mistake you can make is to go shopping on an empty stomach. You’ll only be tempted to fill your cart with calorie-rich foods.
From The G.I. Diet Diabetes Clinic (Reader’s Digest) 2010