Johnrudy, you can do it. First you have to make the decision to do it. You are in the same boat as most of us, knowing what we need to do, but too often, chosing to do differently. Sometimes, with so much opposition between the two, I wonder how my brain and stomach are in this same body. One says feed me now, and I don't care what it is, and the other, usually after the fact, says why did you do that? You know better than that. I am sure you can guess which organ said what.
Believe in yourself. Have friends encourage you along the way. You CAN do it. Baby steps. In one day, you wont see results. However, in one moment, you can create a habit that will change your world, as you know it, forever. Begin now!