Lassie, home girl!
I splashed out on a little toy recently, a Garmin GPS navigation device. Pretty nifty. 3-D maps for all of Europe and a nice voice that says 'Turn Left Now' and that kind of thing. It'll come in handy for those gigs booked for hotels in the middle of nowhere–takes the pressure off.
Ingo suggested another use: as you fall out of the pub (stocious, of course) you can hold it up to your ear like a radio, as it says 'Turn Right Now' etc. and brings you in home without having to expend any brain cells.
I'll be trying it out later on. Any other ideas?