Health security

Staring at computers at night is frying your brain. Here's one easy fix.

There are all sorts of solutions to the blue-light problem. The most obvious is just not to look at screens for two or three hours before you go to bed. Unfortunately, a substantial proportion of my professional work gets done in the two to three hours before I go to bed, so that's not really an option for me.

Hardware solutions include adhesive screen protectors that filter blue light and evenorange goggles, if you want to look extra cool after the sun goes down.

But by far the easiest step is just to install f.lux. It's free for Windows, Mac, and iPhones/iPads**. (There's not yet a version for Android, but there are plenty ofalternatives; I use one called CF.lumen.)