it is hard to get used to the reverse steering being backwards from a car, but when I get in that boat, I change my mentality, and remember something that the dealer told me that took us out for the test drive: "whether you're in forward or reverse, whatever way you turn the wheel is the direction the *nose* of the boat will go". That way, when I'm in reverse, I know I wont get screwed up. The only problem with this is when you turn around to look behind you as you're turning the wheel, you have to think about what the front of the boat is doing even though you're looking at the back. Takes some getting used to, but what a friend of mine had me do first time out was practice around channel markers. If you're willing to scratch the rail up a little (from bumping into barnacle on the post, like I did) in order to learn real good how to steer in reverse and use the forward and reverse without any throttle in order to learn how the tides and wind affect you and use them to your advantage, that's a great way. Another way is to go out on a weekday when no one's around if you can and use the dock, or throw a life preserver in the water and use that if you're on a lake.
As far as docking and launching, we are starting to push off the back of the dock (which is where we should be anyway so the next person can launch), and then fire it up once we are about 10 feet away from the dock. I am also keeping in mind that whatever way my steering wheel is turned when I start it up is how it's going to go right away.
Since docking coming back is the hardest part, I am practicing it a few times before coming in now, and "practicing" the maneuvers just to get it ingrained again after being out on open water hot dogging around . . .
I'm not an expert by any means (or even intermediate novice), but these are the things that are helping me so far.
Craig