I usually carry my SAK. I use it to open letters, open boxes and packages, cut tape, cut newspaper ads or articles, open my Heineken, clean the tread of my sneakers, trim my fingernails, sharpen pencils, remove tags from new purchases, tighten loose screws, take apart and tinker with all kinds of things, strip insulation from wire, scrape corrosion from batteries, use it to prodd or lift things I don't want to touch, remove staples, cut fishing-line, pry open fishing sinkers, remove paper-jams from the printer, cut a flower stem for my wife, and hundreds of other little tasks.