Yes, I keep a small index card size spiral notepad in my range bag. I note the date, whichever gun I'm shooting, and what ammo and round counts with any notes of significance. This only takes seconds as I usually only take 1-2 guns 3 max to the range (because I don't want to clean more than that). I can quickly tally the spiral notepad total round counts each month.
When I get home and clean my firearms after a shoot; I then transfer this info neatly into a large ring binder with a divider (and a pocket for targets) for each weapon.
So, at any time I can quickly refer to the ring binder to know how each gun is performing; total round counts, what ammo shoots best, any issues, etc.
Yeah, I know it sounds anal; but with a sizeable collection of firearms it's the only way I can remember important stuff and it really doesn't take much time if you develop the discipline to just do it.
Some guys only clean their guns when they start to jam. Some guys clean and lube after every shoot so they won't jam.
Each to their own method.