Installing brakes

I am thinking that me losing weight is all about installing brakes...or locks or hurdles or whatever you might call it. I need to find a method to stop myself from taking that first overeating bite because if I do I have a very hard time not to dive in completely.

A food plan is a brake - once planned I need to take an active decision to go outside it.
OA is a brake - I get a food sponsor and have to commit my food to her and call her before I eat outside committed food.
To shop with a list is a brake because if I buy something that is not on the list I have to take an active decicion on that...

My impulsive nature is a blessing and a curse. It has led me into many fun things and new experiences and it has led me to change of plans that ended up in confusion and overeating.

So it is (for me) necessary to install many brakes (or alarmbells) that tells me that "oh-oh, I am now leaving the planned route and entering a path that might lead almost anywhere...