Some good stuff here. I just started commuting yesterday to my first job (it's only 2miles) so I'm still learning (working my way up to my other job across town). The main road I ride on to get to work is very hilly with a good amount of traffic so I usually ride the line since I'll be speeding up and slowing down very often, but I'm not afraid to take the lane if I have a left turn coming up. Other than that, I follow all the rules I would in a car.
I really tried to do my research before I started this as to not screw it up and I think it has helped. I'm also the only commuter in my area (that I know of, haven't seen any more yet) so I'm just kinda wingin' it hoping I'm doing it right. I would hope that if I was to meet another commuter that they would point out my mistakes.
-Jeff