box cutters are great. i use those at work, always have a cheap one on me.

at the ups store we had those ones that have the long blade, that you snap the end off, to "sharpen" it. this girl i worked with didnt realize you could just take some pliers and snap the end off, so she said "watch your eyes" and went to press down on it on the counter. :eek3: "woooahhh.. hold on"