1,2, and 3 above.
#4? No, keep your hands off of my gear. You'll risk losing any tip if you touch my stuff. This is why I will book in advance to make sure it does not happen and avoid ops and places where this is the custom.
#5? No. Stay on the boat where you can be useful in an emergency to everyone. If I want a guide I will hire my own locally. Most times I want to plan my own dive and see what I want to see. Not what you want me to.
Other than that know that I will call or email weeks or even months in advance to confirm details, services, policies, etc. That way other than weather or change in ownership there are no surprises. If I show up and things are changed just because they could be I will do my best to find another op and not use yours.
If all of these are met the crew is likely to get a very generous tip. Extra stuff like tip me off to the x,y,or z that might be in a spot that you did not tell anyone else about, allow me to be first in last out without giving me crap, and don't expect me to buddy up with someone just because I'm an instructor, let me dive solo and look the other way and you'll get an extra tip when I shake your hand and pass it to you without letting the rest of the crew know.