What to keep in the trunk for EMERGENCIES?

Everything I do is govererned by a guy named Murphy so no matter what I carry some thing else will break, so I don't carry anything but a flash lite, some flares, a roll of tape and a ballast resistor.

Seriously it's been so long since I had a car break down it just doesn't seem to matter if I carry parts or not. The Barracuda has been on the road almost 5 years since I finished restoring it and has over 30k miles on it and has left me at the side of the road yet.

Now that I have said that Murphy will make me pay. :\