Get started and get started quick. Too often I have let procrastination become the killer of a positive lifestyle, a better way to feel and think and live. So define your goal and build a positive self image around the goal of the new you and focus on this every moment of every day.
The enthusiasm of becoming your new you will allow you to be strong and eliminate the bad habits, replace the bad habits with good habits and stick to them.
The best start you can make is by sorting out your kitchen and pantry, get rid of all the rubbish that will not benefit you and will be a temptation when you are feeling a bit down. Establish a positive nutrition lifestyle by focusing on foods that enhance and stimulate your metabolism (such as berries, kale, berries, almonds, hot peppers, lean meats, broccoli etc) and lost of water. By having a pantry with these foods as a foundation gives you quick and easy meal as well as snacking options so cravings are curbed by healthy options.
All the best for your journey