I ran across this quote, today - which I think is equally appropriate with the Zone lifestyle as it is in general for which it was intended:
Dr. Yoni Freedhoff:
“Your real goal? Live the healthiest life you can enjoy, not the healthiest life you can tolerate. Yes, if you have weight to lose, you’ll have to make changes. But if you change so far from who you are and what you enjoy, odds are that it’s not a sustainable plan. Don't aim for your so-called "ideal" weight; instead aim for what I refer to as your "best" weight, which is the weight you reach while living the healthiest life you can actually enjoy.”
So, don't sweat the small stuff, nor try to be exact while achieving success with a Zoned lifestyle!