Hidden Linux : Monitor switch-off

My LCD monitor's tricky to switch on and off. Not only is its power button in an odd place, but it's also small, unlit, and flush-mounted. That means I invariably hit Brightness or Menu when I'm head away from my desk for an extended period. But, no worries. Linux to the rescue...

The manual page for xset describes it modestly as the "user preference utility for X", and one of those preferences is monitor control.