Words of wisdom.
As much as I think of myself that I'm more of an introvert person, I've experienced for myself that keeping things that you should communicate to other party involved for yourself, hurts you more in the long run then coming up straight to the forehead, and get it right.
So that ole movie line: "What we've got here is a failure to communicate." should always be somewhere in your mind even before it comes to that, and you can use that in many situations in life, business, or personal relationships.
This is one of the things I have succesfuly changed in my behaviour a long time before, and it has brought only benefits to the quality of the relationships being involved.