I think the key is to be considerate of others and act the way you'd like them to treat you.
Stay out of the gossip mill, try to be a positive influence, deal with conflict proactively and nicely.
When you want to discuss a problem, focus on that single problem, don't rehash every slight you've ever perceived. I see this all the time - a skater is signed up for the wrong event or her name is spelled wrong, and the parents go on and on, bringing up everything in creation. What could have been a ten-minute conversation with a good outcome becomes and hour-long bad therapy session where nothing is resolved satisfactorily. Again, keep your business with your coach private, don't share it with the other parents at the rink.
If you make a mistake, say you're sorry and mean it! Make plans to prevent your mistake from happening again. Too many people gloss over the fact that they're human and made a mistake, blaming it on others or coming up with excuses. It's one thing to say "I'm sorry, I should have taken the time to check that first. I will in the future, but let's see if we can correct the error now." and another to say "Well, I'm really busy and I make mistakes. That's how it is." I really dislike it when coaches and parents blow off their mistakes and repeat the same mistakes over and over.
Just my 2¢