Looking for preop advice

I believe that I'm a compulsive and emotional eater and I know I have to get this under control before I get cleared for surgery. For those of you who have been in my shoes or are currently in the same boat, how did/do you manage? Is it just saying "no" to yourself when you want the chocolate chip cookies. I know that this is something that's been brought up in the support groups that I've been going to but I would like other's opinions too. For those of you who are a few months out and are starting to get your cravings back how do you say no? How do you make sure that you are going to be part of that 80% that does not gain their weight back. My absolute biggest fear about having the surgery isn't death, it's losing the weight and gaining it all back. I know I shouldn't be thinking like this but it's such a serious commitment.

The first step is identifying how many calories and fat grams you should be having per day. Trying to stay within this goal - and the only way to be able to do that is knowing how many calories and grams of fat the cookies have. There are food items that I have a real difficult time saying no to. Anything chocolate is in that category. I do not bring those food items into my house and if they are at work, I ask that they not be left in plain site. You can do it - knowledge is half the battle.

Sugar is my addiction too. I love cakes and cookies and ice cream. I have such a difficult time saying no and stopping when I say yes. How do you get over this once you've had the surgery?