Thanks for the article!

I'd like to add that your eyesight will get worse if you're constantly staring at the screen in front of you.

To help fix that there are a few free apps:
Windows\Linux: http://www.workrave.org/
Mac: http://www.dejal.com/timeout/

They work by forcing you to take short and long breaks. Ideally you should move around when those breaks start. Walking up and down the stairs is quite a good workout.

Regarding the sleep, it was scientifically proven that blue light from the screens makes you feel awake and results in difficulties with falling asleep.
To help with that there's an awesome free app as well: https://justgetflux.com/