I'm being serious when I say look at our primate cousins. Lots of fruit and veg with some nuts. You don't need much meat at all, and oily fish is better. Avoid too much sugar and salt. Exercise regularly and avoid the thing which will kill you if an unhealthy diet doesn't, STRESS. Other obvious things, no smoking and alcohol in limitations. At Cardiac rehab they told me SOME alcohol is better than none at all. I always get my fruit and veg from a market, not from big stores where they are full of chemicals to make them look pretty and last longer.