Spreadsheets/Tracking Neighboreenos

I know I said I keep a vigilant lookout on my my neighbours, but a spreadsheet is a bit much for me. I need to be able to adapt, not only with new neighbours, but with new game dynamics. I prefer just a normal list of names, that I colour code. At the beginning of an event I reset all the names to black. Then as soon as I see you visit me, I change your name to red. That's about it. Doesn't matter if you only visit me once each event. I just want to know if you have visited me lately. I won't bother keeping track of you after that.

Of course my list has a pecking order of guide followers, forum regulars, and the rest. In this event, all that really matters is to have friend's houses to tap. So when the rest haven't visited, they tend to be the first to go.