Spend a lot of time armchair flying going over procedures etc in your head.
I also found tools like RANT very good.
The more prep on the ground the more you will get out of each lesson and the cheaper it will be.
When you're flying you will probably find yourself getting overloaded to start with so the better understanding of what you are trying to do will give you more capacity to fly the plane to the tolerances required.
Most of all enjoy it!