I have a Leatherman Wave that is about 10 years old now. I keep it in the glove box of my car and use it occasionally. I made a tool roll out of heavy canvas that I keep my most used tools in such as screw drivers, pliers, wire strippers and I carry that with me when I'm going to be doing some work.

I have to disagree vehemently about the ratchet screw driver. I can't stand those things. I don't mind a screw driver with interchangeable bits but ratchets are a pain in the ass and don't belong on screw drivers.