Thanks for the responses. Interesting to see how other people do things.

My usual practice, which I know could be improved
1 a - I usually ride 2-3 feet from the parked cars, but move further out in the lane if I see heads in the parked cars or if cars are starting to pass me unsafely.
2 b - I always move to the right, in the spirit of "slower traffic keep right", watch my helmet mirror and move assertively back in the lane when I need to
3 b - Ditto
4 a - but at an intersection where cars often turn right, I try to stop on the (often imaginary) line between the go-forward lane and the right-turn lane/pocket
5 a - I try to keep up with traffic, how hard I'm willing to work depends on how long I'll have to keep it up. On a commute ride, wrapped in head-to-toe rain gear with my 30-40 lbs of bike and stuff, 20-22 mph is doable but 25 mph won't last long
6 a/b - If there are cars behind me, I'll usually work harder to keep up speed until the next open spot where I can move over and be passed. If there aren't following cars, then its up to my mood.
7 b - Maybe I should stop, but honestly this is what I do
8 a - Ditto
9 b - If there are "witnesses", I'm more likely to do "c"