I can tell you this much for certain: since I started living my life in this way, helping others, being grateful, humble, forgiving and able to admit my mistakes, life has been amazing. I don’t always get it right, I’m still learning every day and I’m definitely not perfect, but I firmly believe these are the keys to a happy, healthy life. Combine

Become a warrior! Blitz your stress and channel your rage into fighting exercises like ju-jitsu and hanging out with your friends playing your favourite sport. Lots of men do this when they’re younger, but when family and work come along they feel they can’t spare the time. However, it’s vital that you make time for exactly this – it will reduce

JAMES’ FAVOURITE STEAK Being Australian, I love a good steak. In fact, I’d say it was in the top five of my favourite foods ever. However, I limit myself to no more than one a week and I always eat the best-quality steak I can get. It’s far better to have an expensive steak once every so often than it is to eat loads of cheap, non-organic

He had forgotten one of the simplest rules in life: do something you enjoy. It wasn’t as simple as writing a few songs and having his depression cured, but over time, he felt his depression lift.

And try to avoid what I call ‘junk caffeine’ – the fat bombs and adult-sized big-belly drinks like frappucinos and lattes with syrupy shots of flavour like vanilla. Stick to good-quality coffee with a little full-fat milk or cream and don’t add sugar. If you need flavour, just add a sprinkle of cinnamon.

Good fats also reduce sugar cravings, lift your energy levels and keep you feeling full for longer. They improve your concentration levels and brain power too, so if you’ve got a stressful job that requires you to be particularly alert and attentive, make sure you have plenty of good fats in your diet and take fish oil supplements. (See also

Never eat sugar on its own (and this includes fruit and honey). Always eat some protein and good fat with it (try a handful of nuts or a slice of meat or fish) because they slow the rate at which sugar floods into your bloodstream. If sugar hits your bloodstream too fast, you’ll quickly feel high then, just as

Green tea This is a great source of caffeine, so it’s a good early-morning pick-me-up. Studies show it also speeds up your metabolism. Have several cups a day in the place of coffee, but never have it after lunch – the caffeine will make it hard to fall asleep.

My Clean & Lean theory goes like this: a body can never be lean unless it’s clean – and toxins stored in fat cells prevent this. So if you’re trying to get in shape, but you’re toxic, although your body will lose fat, the toxins will have nowhere to go but back into your system. You’ll feel tired and weak and because your body will decide it