Before - Take pictures in high definition of every square inch of your house. Literally, break your room up into quadrants and classify each quadrant. Specific details you will look back on later, paint chips, holes, wear and tear, it will give you a base-line to compare damage to. Additionally, create a google spreadsheet of every item in your home, where you got it from, a link for a replacement, a picture of the receipt if you have it. Categorize items by room.
2. Automate Your Property
3. Always Be the Bigger Person
4. Be Quick to Apologize, Then Quickly Go Above and Beyond
Yeah, well, some things are obvious, he seems a control freak and the advice how to be a bigger person instead of insulting furious guests inwriting, is quite hilarious. I call people "missionary " in my mind, who discover a thing and turn their experience into a manual or a religion.