Whether you're flying a jumbo jet at night or working on a crossword puzzle in the dark, the Pilot's Pen is a nifty solution. The LED-powered penlight illuminates the page while you write, or you can retract the ink and just use it as a mini flashlight—useful for checking a map or locating something in the night driver's glove compartment. The Pilot's Pen will set you back 20 bucks, and it's available at Amazon.
Pilot's Pen [Cool Tools]