Need to work on focusing? Try out the Tea Time timer on Launchpad. You can set up set periods of time. Depending on your work style that might include a timer for when you need to look away from your display, how long you should be in ‘flow’ time hacking on your code (vs. answering emails). Neat, clean app. Love it.
$ sudo add-apt-repository ppa:teatime/ppa
$ sudo apt-get update
$ sudo apt-get install teatime-unity