What helped me was f.lux <http://www.stereopsis.com/flux/> http://www.stereopsis.com/flux/>, a tool that adjusts the color temperature of your screens during th

What helped me was f.lux <http://www.stereopsis.com/flux/> http://www.stereopsis.com/flux/>, a tool that adjusts the color temperature of your screens during the day, following the natural daylight pattern. It's available for Windows, OS X and Linux, and it's free, so I recommend trying it out.