Think about it like this...In the right seat you are there monitoring someone else doing the work and criticizing it. It is allot different when you are the one flying the needle. I think that the best thing to do before going to class is nothing but instrument flying on your own not watching someone else. I have spent the last 8 months doing nothing but IFR work to get as prepared as possible for Training. Basically you need to be able to fly IFR second nature without much effort so you can focus on the procedures and callouts. At least that is how I am preparing myself for class. I will let you know in a couple of months how it all works out..