Don't Cross the Solid White Line -
The solid white line is there for a reason: wait till you are past the solid line before you change lanes. Think about it: you are going around somebody you can go around a little later, and irritating all kinds of people when you do it.

Don't Drive Next to a Bus -
or a truck, they cannot see you! They have an extended blind spot. Remember your blind spot? Many people have forgotten about them. Drivers of most large vehicles have the ability to detect a vehicle driving next to them with electronics, but don't take a chance! drop back behind them or go around them!