Relaxed focus and control can be achieved, and these methods have helped me out immensely both professionally and personally. I highly recommend learning as much as you can about Getting Things Done (GTD). It has helped me stay sane, and helped me to keep my focus and concentration (although I still have problems with overcommitment and extreme laziness, but I'm getting better at it :) ).

I use Linux exclusively, and have implemented GTD using the following systems:

There's some weird people who use GTD with emacs. I guess emacs CAN do everything.

More links to check out: