96 Accord - After warming up, random engine misfire

1996 Accord LX 125456 Miles - after warming up the engine misfires at idle -random and not constant. And at HIghway speeds, random misfire. Not constant.

Could be a number of things, but I'd look at obvious things first. Is check engine light on? If so read the code and go from there. If NOT, look at maint. record on it....have plugs/wires and distributor cap/rotor been replaced recently? Around 125k it could be as simple as those parts. I typically change plugs every 45-50k, then every-other time I change plugs I change those parts as an entire set, as they're "wear items".
If those things are new/newer, and you don't have a check engine light, it's going to be a little more work to figure it out. Is it completely random, or is there a time when you know it'll happen? Meaning, can you reproduce it at will?