I used to carry a swiss army knife but I found most of the tools I never used. the scissors were not strong enough to really trim my nails. I like to use regular tools if at all possible they are faster and more comfortable. I got this guy http://www.leatherman.com/style-cs-24.html#start=27 the scissors are strong enough. then a bench made knife.
this looks cool too http://www.leatherman.com/tread-425.html#start=1
this looks cool too http://www.leatherman.com/tread-425.html#start=1