Agree with almost everything
It's a matter of always thinking about how to do everything you need to do to play the game properly and enjoyably, but in a manner which makes the most efficient use of the time needed to do that.
So thinking about your putt while others are putting, someone picking up the flag while the last person is putting, parking carts so you can exit the hole and get to the next tee with the minimum delay all are good suggestions.
However, having a reasonable look for a ball, even in situations which don't look promising, should not be out of the question. What I hate is guys who go in to look for their ball and don't seem to want to come out until they have a half dozen in their pockets. And no driver off the tee until you can shoot under 95!! Where's the fun in that ;) ?