|Photo credit to psychotic zingers|
You're looking to string your successes together and create some steam. Not "perfection" everyday for 3 weeks and then not again until your pants don't fit -- that's exhausting!
Pay attention to how you're feeling. Work on strategies for yourself. Keep what works for you and chalk the other stuff up to your learning curve.
You're looking for positive momentum. That is what will keep your weight management efforts successful for a lifetime.