Long-time RideApart readers will know that if there's one tool to rule them all in my house, it's the pocket knife. Yes, multi-tools are great, and having a full garage stacked with every tool imaginable is the best, but for me, and how I live, the one tool that's nearly always with me is my pocket knife.
I say this, as I tend to go by the saying, "The tool you keep with you always is better than a tool you have to remember to grab." And a pocket knife, although it's designed for cutting, sawing, and other needs, can be used in such a multitude of ways when you dispense of mechanical sympathy—and understand you can always sharpen the blade—you'd be hard-pressed to find a better, more steadfast tool.
And one of my favorites, the one that's literally on my hip as I write this article, is Benchmade's PSK (Personal Survival Knife), as it's rugged, sharp as hell, is tough, and can be put through a multitude of situations without fail. It does have an issue, though, and that's the knife's price. It's a premium pocket knife, so it commands a premium knife's $400 price tag (and $450 for the carbon handled version).