Think back -- how often have you been actively working on managing your weight? Now think again and notice I said "actively".
Actively means you are thinking about what you are putting into your mouth every time it opens up. (So in a really mindful meal -- maybe you are only actively paying attention 20% of the time)
What about all those other times when, if someone brought your eating to your attention, you would stop but since they don't bring it up you keep on munchin' away? Are you actively working on managing your weight then?
What about the 6 weeks you were on your last diet? Sure, in the beginning you were actively working since there was a certain amount of self imposed awareness -- and you lost weight, didn't you?
But what about the 2 or 3 days before you gave up that diet all together? Where you actively working on managing your weight during that time frame? I bet not! I don't know anyone who actively manages their weight right up until the instant they decide they have had enough of that particular diet.
My point is this: understand what you're doing. If you don't want to actively manage your weight today -- then don't. But don't misunderstand what it takes to make weight loss happen.