Good to hear that you're becoming healthier, but....

In most case dieting doesn't work, try to eat better and start walking first as a workout. Once your body start to exercise, your appetite for junk food will slowly diminish. it is always good to keep a journal of your progress, it is a good motivator, and you will be able to keep track of your progress better rather then if your were to just remembering things off of your head. You can treat yourself once in awhile. For example, everyone week you eat healthy, but on Sunday you can eat anything you want, then when it is 12am, go back to your normal routine that you have establish. If there are days that you lack inspiration to workout, ask a friend to workout with you, it is always good to have someone there to take the weight off when you are doing some bench press. . Lastly, set up attainable goals for yourself, not to easy, not to hard.