Answer:
There are no secrets. A proper, nutritious diet combined with a healthy amount of exercise is all that is required for normal people. If your condition has a medical basis then you should seek professional attention.
There are, however, some tips that can help you stick to it. i read a lot online and 2 main tips are helping me - find one exercise you love and do it - if you are doing stuff you are not enjoying you will quit pretty fast, some food items are hard to give up on - so dont remove them from your diet - but find good enough substitute items to replace those.