What I notice as the biggest obstacle with those who want to lose weight is that they really don't know how to eat healthy. They don't know how to shop healthy, how to cook healthy, or even that the food they *think* is healthy (fruit snacks, diet soda) is not actually good for them. And when they get to the point where they know they have a problem they don't know where to start because this is the way they've done it their entire lives.
If you are trying to lose weight while the rest of your family eats "normally" it is not only harder for you, it is just laying the foundation for your kids to grow up and be in the same hard spot you are in now. They won't know what to do, how to cook, or where to start. And they and their love ones will panic when their health/life is threatened.
Start now. With school starting everyone is thinking about packing lunches. Try to think of REAL food you can pack, and not a package of fruit snacks, a juice box, chips, and a lunchable. Those are terrible choices on a regular basis and are not teaching your child the necessary habits for a long healthy life. In fact, when you pack their lunches, you could prepare one for yourself to make your own choices through the day better.
Don't worry, this video will make you think but it's not graphic.