One really good salad that has been a hit with my folks recently is a base of arugula, with sliced avocado, mango, red onion and jalapenos thrown in. Add orange champagne vinegar just before serving. It has made believers out of skeptics
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).