I've learned a thing or two from some colleagues and myself over the past several years on how and how not to react to different situations in the real estate business.
Got an offer that's not quite what you were hoping it would be? Appreciate that you got an offer. There's a buyer out there that wants to buy your seller's house. Work together to come to agreeable terms. Getting angry at the buyer or the agent who wrote the offer only sets everyone off on the wrong foot from the get go. That's just counter-productive.
Lost a buyer due to a misunderstanding about who was going to be working with said buyer? Assuming you haven't spent too much time with the buyer yet, work out some sort of referral fee or perhaps just let it go. Sometimes it's better to just walk away rather than create awkwardness and confusion for the buyer.
Have a buyer who's making some less than desirable demands of your seller? Keep cool about it. Cursing out the buyer's agent is less than stellar and just unprofessional.
Think your level of production puts you above those around you? Having the ability to stay grounded and offering help and advice to those around you is a much better thing to be rememberd for.
Behave and react with grace. It's a pretty nice way to set yourself apart from those around you.