Often your body craves sugar and carbs when it's feeling stressed out or worn down. Your body does this even though it knows the post-carb crash will be worse than what you began with!
Studies have shown that just about any person who takes time to unwind after a long day, or even takes a nap, will eat fewer carbs when they sit down to dinner. Their body does not crave that sugar-rush to pick them up - they have already unwound naturally. The fewer carbs and sugar equate to less pounds packed on the hips and stomach as a result!
So be sure to pay attention to your body's energy levels during the day. Drink 8 glasses of water, take your vitamins and be sure to snack on healthy foods so that you never go more than 3-4 hours between meals. That should keep your energy levels up so that when you approach the main meals you eat what is healthy for you - and not to satisfy short term cravings!
Stress and Weight Loss
Low Carb Basics
Lisa Shea's Library of Low Carb Books