I don't know if you've tried this, but serving food on smaller plates can help control portions. If you eat a smaller amount of food but it fills up a smaller plate, you feel fuller than if you ate the same amount from a larger plate that wasn't filled up. A fist-size lump of meat looks bigger on an 8" plate than on a 10" plate.
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).