Most of the year I just carry them in a pants pocket, which pocket dependent upon what I'm doing. I usually wear jeans, sometimes khaki slacks or shorts if it happens to be hot, which is pretty often in Alabama summertime. During the winter, I will most often have a jacket of some sort on and will put them in a jacket pocket where it's easier to get to them when sitting or driving. I have a couple of big folding hunters that have leather belt pouches for carry, but the one that's actually carried and used occasionally is a Queen 44 single bladed and it's flat enough for pocket carry.
A little pocket weight has never bothered me; when carrying billfold, change, vehicle keys, cell phone, etc., most any "pocket" knife will not even be noticeable, just part of what's always there anyway.