Each neighbour can tap your tile three times a day as long as they log in and out of your account that many times. If they give you decent enough time intervals to log in and out you can collect up to three tiles. You can play tile tag as in I tap your when I'm ready for the next one or you can PM each other on this forum to arrange times. I just joined a Squidport add me friend thread and have 10 friends who I exchange daily tile taps with. That way I don't personally feel I have to bother with triple taps.
Just keep one handshake up at all times for as long as you can and only clear the ones on top of that one.
