Laura I know that it is hard to stay focused. I am trying to help my daughter who is 13 to lose weight and get healthy. I buy 100% whole wheat bread, noodles, cereal and rice for her and try to limit it to only 2-3 of these a day. I look for food that does not have more than 5 grams of sugar (cereal no more than 8 grams). I encourage her to eat lots of vegtables, fruits, a few nuts, leans meats and fish/seafood. (When I'm not looking she cheats)
The biggest help to her is the exersize. We go to the gym together 3-4 times a week and do cardio and weights for about 1 hour. I put her in dance and cheerleading which she does 3 times a week at the rec. center. This has helped bring her down a pants size in the last 2-3 months. She has lost about 17 lbs. since the last week of October.
I would sugguest that you do some type of exersize 4-5 times a week for about 30 minutes. Even dancing with music on will get you up and moving

And drinks lots of water. For weights you can lift cans of vegtables or whatever you can think of...get creative.
It is a slow process...but well worth it. Don't give up and start everyday fresh.