How to Work an On Call Job and Keep Your Sanity
lifehacker.com
The key is to draw bright lines between your "on" and "off" times, and manage your coworkers expectations for when you're supposed to be available.
lifehacker.com
Back when I had a pager and was on call, I'd set it on top of a shallow pile of coins. The racket it would make and the sound of coins falling onto the (hardwood) floor was enough to wake the dead.