I carry a Squirt S4 on my keychain - it has all of the day-to-day tools I need for office/home survival - and a Juice KF4 in my Daytimer (along with a small "urbanized" PSK) for more, um... robust needs.

This combo covers all of the tools I require with no overlap, and allows me to taylor what I carry to the situation. No sense cluttering up one's pockets.

.....CLIFF