Here is the post I made to another entry. Hope this helps.
I had twins 6 mos ago. I gained 57 pounds w/ the twins, lost 22 before I left hospital. I have 9 pounds to go to get to pre-pregnancy weight. I also have a 3 year old and was able to get down to 8 pounds below my pre-pregnancy weight before getting pregnant with the twins.
My secret has been jazzercise. It includes aerobic and strength training. Strength training helps you build muscle which helps your body burn more calories when you are not exercising.
My suggestion is find some form of exercise you find fun and do it 4 times a week. Consistency is the key. When you enjoy your workout, it's easier to get in that 4 times a week. I am not a very disciplined eater, but as I see the weight coming off I am getting better. I have moved from "i can't have that" to "that is the enemy of my progress!!"
keep going! There is no easy fix! You can do it though, little by little. Remember, it took time to gain the weight and it will take time to safely lose it .