I did the barn staff thing for years and could easily rant for days about boarder/BO relations, but to keep things short I'll make my contribution simple:
1) Learn to communicate effectively. Most of the threads I see on here involve an unhappy boarder who did not go to the BO when issues arose, to the point where things are out of control and people are upset. Stay calm, give everyone the benefit of doubt and aim to work WITH the BO to find a solution as opposed to complaining and demanding change.
2) RESPECT. Respect the barn's way of operating and educate yourself before you move in. Respect the roles of the barn staff, the BO, and you as a boarder. Be considerate and polite, and you will have a better experience.
3) Good barn staff > 1 boarder. I cannot stress this one enough. A well run barn will not have a problem filling stalls, but good reliable barn help and keeping it is very difficult. If as a boarder you are clashing with the barn staff or making unreasonable demands, more often than not you'll be finding a new place to board.
4) Respect other people's property, but also consider protecting yours. I don't like open tack rooms and would never leave any tack or supplies out for others to access. If the place doesn't offer personal lockers, a locking tack trunk is a good investment. Additionally, save special halters/blankets for shows or use at home - horrible things will happen to the halter you hang on your stall door, accept this as a fact of life and buy a cheap one.
I'm assuming that 66Domino's comment about gifts is a joke
Boarding is a very costly operation with very narrow profit margins, so if such a stable has any right to stay in business, virtually all of that $1000 goes towards taking care of your horse and the amenities you enjoy.
The work is thankless and destroys your body, the hours are long, and burnout rate is very high. I did it out of love for the horses and the industry - I never expected more than basic human decency from boarders, but the odd thank you or small token of appreciation during the holidays means the world.