When you communicate with others, try not to assume that they're going to know what you're talking about. You have different experiences, different opinions and different ways of communicating. Bridge the gap between you and others by doing the following things:

Be Specific
Take the extra steps to give enough detail to make yourself very clear.

Repeat
If something is very important, REPEAT IT. Say it again and say it in as many ways as you can. People learn through repetition.

Find a common language
Use words and gestures that everyone understands.

Use those three strategies when you work with others and you will notice that your communication will get better results.