I got in a lot of trouble once with my girlfriend, I spent £40 on a solar pannel breifcase from Maplins. My reasoning was if there was a zombie apocalypse then at least I could have electricity for essential things ie.. Xbox, FIFA, Internet.
She was not impressed and berated me in front of friends for many months. However she was very greatful on a recent camping trip when her phone battery went dead.
I'm just waiting for the first signs of a 28 Day Later-esque virus outbreak to say 'Ha, I told you so'!
I also own a nifty axe that I got from a Cornish gift shop, which I imagine would be fantastic in dealing with the walking dead.
Anyone read this: http://www.amazon.com/Zombie-Survival-Guide-Complete-Protection/dp/1400049628
Great fun!