I see many women who are in your same position. And getting your weight to the proper level prior to your tummy tuck is very important in terms of getting your best result, and reducing your risks of complications.
Fortunately or unfortunately, weight loss is fairly simple in concept. If you burn more calories than you eat, you lose weight. There have been many different diets that have been designed to help reduce caloric intake, but they still all boil down to simple math. And while this may be simple in concept, making it happen is another thing entirely.
Understand that losing weight is only part of the issue. Maintaining the weight loss is another, equally important part of this process. In order to do this, you have to change the way you live, and make a change that you can live with and maintain once your weight is where you need it to be. This lifestyle change has to include both diet and exercise. One without the other, will not be as effective.
Your goal should be gradual weight loss. A couple of pounds a month is really quite reasonable. And if you are losing your weight at this rate, you are more likely to be able to keep the weight off.
In terms of successful dieting, two things seem to be key: portion control and accountability. One of the reasons Weight Watchers is so successful is that the meals provided have set proportions. This is one way to limit your caloric intake.
Stepping on the scale each day, or a couple of times a week is key. This makes you accountable for your weight, and it lets you know where you are in the process
But most importantly, don't get discouraged! Slow and steady wins the race. Also be aware that as you lose weight, the skin of your abdomen will get looser, and sometimes even look worse. Remember, this is temporary and will be fixed with your tummy tuck. So hang in there.
Best of luck!