I agree with andrew. The actions of a good driver never cause another driver to take action. That was one of the first things my driving instructor told me all those years back and I took it to heart. In addition, a good driver is able to anticipate through observation what is about to happen and take evasive action long before it is necessary.
I agree with him, and also someone who obeys all of the laws (even in a parking lot or a fast car, doesn't make stupid maneuvers to save time, and just drives.
If you don't have the time to do it right, when will you have the time to do it over?