I'd advice everyone who uses the computer more than 4 hours a day to start
training your opposite arm for doing trivial tasks, to take the load off your prefererd arm.
No, this is not a w*nking thread
When you are playing games or designing and are in need of more precision
mouse-movements, use your preferred arm, but trivial tasks like open a program,
closing, editing text, moving around on screen, try using your opposite arm.
It's very awquard in the start, but you'll notice not only does your dexterity improve
but you'll also feel tension release in your preferred arm, which you've never
thought about that you had.
Also, in cases where you attain an injury, or suffer for the "mouse-decise"
having training using opposite hand can help you from being off work and prevent injuries.
Just a tip - get a second mouse. Just a plain one, most mouses are created for
right hands, i got Logitech MX518 which is right-hand-formed,
and a standard DELL mouse, which fits any hand for my left.
^^ just a general health tip
).