Carrying a boxcutter along with you seems like a good idea for all of the reasons John mentioned, so long as it doesn't put you over the limit on space or weight. The little skinny blades are fragile compared to a "real" knife, but they cut like nothing else for as long as they last.
OK - show and tell time...
Upper left is a Grohman boat knife, same brand and similar size to Jimmy's, but a different blade style. I carry this on the water along with some sort of pocket knife. The sheath is secure, and I put my hand through the lanyard before pulling the knife out. A nice, well made general purpose knife. I'd recommend Grohman to anyone.
Next down is a Puma Prince folding hunter. It's a lovely sturdy traditional type of a knife that I carry on day hikes. (along with a smaller pocket knife)
Next, with the blue aluminum handle, is a Puma rescue knife I got on sale for about $50. Nicely made, partially serrated, and with a blunted tip. I've been wearing that on my work pants lately, using it for opening cardboard cartons, cutting through stretch wrap, etc. It isn't perfect for anything, but it is versatile and sturdy.
Top right is probably the best all around every day knife I have, a Benchmade Mini Griptillian. Great all purpose blade design, wonderful lock mechanism, well made. Small enough to be clipped in my pants pocket or waist band without bugging me, that knife gets carried more than anything else. I like something larger for outdoors activity - like the Puma or the Grohman - but for just walking around, this is my go-to knife. They make a larger version that would be a good choice for an outdoor knife, if a one hand opening folder suits your fancy. Kinda pricey, but really well made.
The little two bladed Buck folder spends more time in my pocket than any other knife. Made in USA, very inexpensive. I cut off the tip of the small blade to make it more like the spey blade on a stockman. Good for opening boxes.
The Browning stock knife with the rosewood handles was a birthday present from my dad when I was just a kid. I don't like a pocket knife that bulky (rather have it on a clip or in a sheath) but it is a nice German knife and I carry it once in a while just because.
The next folder down is a pretty large Boker. Decent knife, but I don't use it that often. Too bulky for day to day carry, and the Puma hunting knife is sturdier when I'm hiking.
Itty-bitty Case two bladed folder for slacks when I really don't want large chunk in my pocket.
At the bottom is a US Army Camillus that was given to my dad by a family friend. I can remember dad opening cans of Pennzoil with it, and doing other abusive chores. It is a hard knife to hurt!! It seldom leaves my nightstand. Lives next to a .357 that is part of an entirely different collection of tools.