Lavatory Navigator
The toilet isn't an obvious room for gadgetary, as a magazine of some description usually provides the necessary distraction. But some bright spark has come up with the Lav Nav toilet night light, which attaches to your loo and provides a particularly cool illumination when it detects someone approaching, and switches off again when they leave.

On a basic level, it will at least show you where the toilet is at night. But for all you blokes out there, the Lav Nav night light glows red if the seat is up (meaning go, go go!) and green if the seat is down (meaning danger, you could get yourself in a lot of trouble here!). Now although this may sound like a miracle product for post-pub toilet visits - especially as you don't have to suffer the unbearable glare of a 100W bulb in the middle of the night - it does mean you have absolutely no excuse for any trajectory issues and that your morning reprimand could be even worse.
This is a great little product that combines practicality with cool, and is not to be sniffed at - and certainly not once it's been used!