Like everyone here, @Lizzie , I have become better (I hope better) by being stricter in some ways and nicer in others.
When I started, I came off as so incredibly laid back that one of my first sets of guests assumed they could treat the treehouse like a personal cottage after that first visit, and come for free whenever they liked. Crushing that dream was my first bit of strictness.
Other strictnesses followed, like standing firm on number of guests, third party bookings, off-the-platform deals, announcements that rules would be broken. It is much easier to enforce things with, "I'm afraid Airbnb does not allow..." Grateful for that.
I am much nicer than when I started, though, in what I provide for guests in the way of amenities. I have listened to every bit of guest advice, and taken anything reasonable and good on board.
For myself, I am a more efficient cleaner than I was seven years ago, thanks to lots of practice for guests and the wonderful advice in this forum. Thanks, you wonderful cleaners!