Eat more vegetables and fruit and extra raw vegetables (salad and smoothie)
Eat more nuts and beans
Supplement with omega 3, vitamin C, B, antioxidants like grape seed extract and marine pine bark, coq10, alpha lipoic acid and minerals.
Drink more water
Move more and become more physically active. Just walk a little more
Stand more and sit less
Socialise with positive friends and groups in your spare time instead of watching television
Go to bed earlier and get more sleep
Minimize stress and learn to relax (without drugs and alcohol)
Meditate
Develop and attitude of gratitude and enjoy life more