Leo (at Zen Habits) recently wrote a post entitled Do One Thing Well. On his blog, he talks about simplicity and doing work you love.
He advice has the ring of truth to it, though, for us, as well.
Think of the weakest spot in your eating behaviors. For many people, it is the time after dinner when they sit down to watch TV. Pretty soon, they're in the kitchen scavenging for ice cream, salty or crunch snack and the snacking goes on until bedtime.
99.9% of the time, this is a boredom or habit driven behavior. You may think you like it...and you really may...but could you make one small change (do something really well) and kick start your weight loss?
It has been my experience with clients, that what they enjoy in that snacking mode, is the behavior --- not the food.
If you're looking for the most bang for the least buck -- find a weak spot in your eating behaviors and alter it. You don't have to do everything perfectly -- just do one thing well!