I wish people would use their turn signals to signal their intentions. I hate it when a car comes to a complete stop, and then turns on the signals or not turn them on at all.
Also, if I'm at a complete stop with my turn signals on, sitting in the middle of the road trying to make a left, and you see me from 200ft away; change lanes NOW instead of the last minute or braking at the last minute. On the main street to turn onto our residential street, this is how all those rear-end collisions happen.
I basically do all of what was in the OT. Cruising on the highway, I usually avoid the left lane unless I need to pass.