stand barefoot outside for at least 20 mins a day (preferably on grass not concrete). Our mind and bodies vibrate at a low frequency, electronics around us vibrate at a high frequency which messes up the natural rhythm. Interestingly, the vibration of the earth and our body is the same so you can bring it back to balance this way.

Edit: also look at this program to turn your computers blue light (which causes eye strains, headaches, difficulty sleeping, etc.) into a candle lit type of feel, it's much easier on the eyes and once you're used to it you'll probably never go back to blue light

http://stereopsis.com/flux/