Profssionalism

Being a young hopeful actor wanting to get into the major, one of the things I keep being reminded is that at BYU, part of the evaluation that determines whether or not we get into the Acting Major track program, is if we are courteous, punctual, and professional in all of our classes and projects at the Theater/Media Arts department. "Professionalism" is a word that my director for Cymbeline reminds her cast of every rehearsal.
By the way, I'm in a children's adaptation of Cymbeline, a play by William Shakespeare. It will play at BYU end of January and beginning of February. There are two versions of it playing at different time slots, I am in the fairytale version as a creepy villain, and a conflicted servant, and also as an old wise man in the woods. Should be fantastic.
Anyway, I keep being reminded in all of these projects I do that we need to develop professionalism and act like professionals. I am quite grateful for their concern we are already acting like the pros before we are the pros, but sometimes I don't think any of us stop to list what we mean by professionalism. I have taken it upon myself to write down what I think the biggest parts of being professional are.
1. Punctual. We need to be on time, regardless of the career path we have. In every career, the boss appreciates it when people come to work on time, and are much more likely to give you raises or recommend you when you change jobs. As actors, it is especially important to be on time for rehearsals or shooting because of how much everyone else is doing to make this project fly, and just as we cannot complete a puzzle without every piece, we can't do a film or a play without its actors. Also, it just sets a good impression of yourself, just as it does in any career.
2. Courtesy. We have all heard the celebrity gossip and actor's gossip of how poorly certain people are treated and how big divas acting like they all that, telling the world they got more money than sense, not bothering to be civil when they go, ohnoyoudidn't, cause they think life should be handed to y'all in plastic spoons but to them in a silver platter, well honey let me tell you something, 'cause THE WORLD DON'T REVOLVE AROUND YOU! There are a lot of people all working to make the film or play a hit, and they appreciate when people aren't rude and don't talk down to them. Just because you are the one on camera does not diminish the contributions of the thousands of crew off-camera. When things don't work out, accept it, rather than try to point fingers and pin blame. Show appreciation to everyone you work with, even if they don't reciprocate
3. Humility. Don't believe your press clippings, don't believe gossip, you are never perfect at what you do or at treating your neighbor like you should. Accept now that you will always be imperfect and need to improve, and seek for ways to improve. Everyone is working on the same project, and they all need to be fed. You don't get special privileges because you are an actor, get in line for food and don't hog the hot cocoa!
4. Hard work. Never be lazy on the job, it can get you fired. A lot of stuff happens before you can go on, like sets, makeup, costumes, blocking, rehearsal. You have lots of time to get lazy, but you shouldn't. When the curtain rises, the audience doesn't care whether you're in the right mood, they expect it when they pay money and see the curtain rise. The director expects your best at the second he asks you to rehearse, regardless of how talented and respected an artist you are, you are expected to perform perfectly when you come on stage, so learn to actively prepare for it by working hard and being diligent in rehearsals. Only perfectly diligent practice makes a perfectly diligent performance.
If you think there is more to professionalism, what other 5th trait would you add to this list?