Almost 40 and time to get healthy

I have had a problem with my weight going up and down since I had my first child 18 years ago but really didn't have to try to hard to lose it. But since I had twins 5 years ago I have had such a hard time losing the weight. I will be turning 40 this year and it is time to do something about it. I am 5'4 and 153 and want to get down to 120. But more importantly I want to change my eating habits to include more healthy choices and to start exercising to boost my nonexistent energy level. I know I can do this...I have to do this. Good luck to everyone else and I can't wait to see how we all do!!!