The one thing I that I struggle with is completely cutting out a certain food.  I am much more about all things in moderation, which is why I never do well on strict diets.  In the past 2 weeks I've lost 6 pounds and I've still had a Big Mac, a chocolate bar and donuts.  The trick for me is to eat well and calorie-wise 90% of the time, knowing that I can splurge that other 10%.