Ways to reduce computer eyestrain

As a software professional my daily activities involve heavy usage of computers. The main problems associated with such job is eye / neck / back problems and other problems like Carpal tunnel syndrome (CTS). Today lifehacker pointed me to lighting blog's 22 different tips for reducing headaches, backaches, and reducing other symptoms of eyestrain at computer.

The most obvious of them is to take frequent breaks. (You can try WorkRave, AntiRSI for free or pay for similar other softwares rsiwarrior, RSIGuard). The blog suggests other novel ways of arranging seat, lighting, monitor etc to help you.