The behavioral dynamics at your workplace are totally different from your home. You really have to be careful about what you say and how you say it. For instance if you are present at a meeting with your team and you are giving a presentation to another team you should never show disagreement in front of the other team (the other team could be the client or the customer).
Similarly you should avoid personal remarks at your workplace. Be careful when you are using names. You should never misspell names or mispronounce them; people are normally very sensitive about their names. If you’re not sure or don’t know how to pronounce it ask the name to confirm. Many more such things are discussed in this blog post.