Weight Watchers is a great program! They do have great recipes for satisfying your sweet urges and it teaches you how to eat. The more fiber you eat, the less hungry you feel. Also, protein, protein, protein. It also helps you feel full and helps muscle burn fat. Another drink besides soda is Crystal Light. Their lemonade is really good! I started WW after the birth of my first two children. I just had my third in June and started utilizing their program again in combination of working out.
Start an exercise program as well. If you incorporate that with eating right, the weight will come off quicker. Start out slowly, maybe walk 20-30 minutes a day, then increase it by 15 minute intervals. Weight training is a great way to burn calories too. If you have a gym nearby, ask them about personal training. Some personal trainers will incorporate 3-4 people in a session - which makes it cheaper. I had a personal trainer and was in a group of 3 people. It really helps to see others in the same boat. At the same time, you make new friends. I met a gal in my last training session and we decided to go off on our own and work out. When we need a little boost, we just go for one session now and then. It really works!
I'm not a cardio fan, but learned to like it. We do spinning a couple of days a week and weight train three days a week. It took me a long time to dedicate myself, but it was worth it. I have another 20-25 lbs to go and I'll be at my pre-pregnancy weight.
Good Luck to you!