Here's how to start: Cut all sugar and high fructose corn syrup and white flour out of your diet.
That's how you start. Do that one thing and you will find yourself going down only a couple of the aisles at the store instead of all of them. Eat raw vegetables and fruits to take the place of the boxed and bagged things you no longer eat so that you will not be hungry or craving.
This is how you start.