Here's what I do to try to be a good neighbor:
1) I visit daily (ok, usually daily. There's times where I miss a day here and there)
2) during "events" I try to do things that help neighbors towards collection of whatever. Unfortunately, gift bags are so thin at times, I can't give everyone one, so I prioritize based on who gives me one+, who taps high value items( more on that next ), etc
3) My what to tap priorities
- During an event I look for high value targets. Anything that takes 4+ hours to pay out. The Simpson House takes 45 seconds to pay out. If you tap it, that resets the 45 second timer again. In all likelyhood I'm not going to be able to collect that first payout before the next payout is ready, and they don't stack up.
- During normal gameplay I look for the following items to tap first:
Squidport TileNews StationFarmStageSomething I can Spray paint
That's just my take on things