It's not a diet, it's a lifestyle and mind set change.
Focus on the small things, give yourself credit for each good small choice. Be patient!
Be willing to explore lots of things. Food, exercise, make changes in your spaces. But most of all, you have to get your head in the game! You have to be positive, you have to pat your self on the back for each good/better choice, and let the bad ones go, and get right back in the saddle!
3+ year maintainer.
The human body is capable of amazing things! But without the mind, it is nothing. Get your mind in gear and the body will follow!
Be selfish about caring for yourself, you deserve it!