Consistency & Punctuality! The two pillars to success in any industry! I think that both of these traits are indicators of being discplined which (in my opinion) is more important than anything else!
Without discipline you'll never follow through on any of your dreams/goals/desires. Discipline is an attribute that needs to be trained and obtained over time. Nobody is 100% disciplined all the time but the more you hold yourself accountable, the easier it'll be next time.
I can't agree more with your sentiments about success in the service industry. One of my biggest pet-peeves is co-workers who only look out for themselves and don't think about the restaurant staff as being on the same team. Just like consistency, punctuality, and discipline are pillars of success...selfishness and laziness sure paths to failure!