Here is a little tip that I think will help. Two things really.
One is that when you are at your computer, turn your mouse upside down and get used to doing things squirly. It is not the same, but it helped me out.
The next things is to orient the occlusal plan perpendicular to your midline. Sit at the 12 and then orient your bur so that it is pointing at your belly button. Then you are always on the right axis, at least in one plane. This is really handy for dropping boxes. Though you wont be working at the 12 much, it is kind of like training wheels, and once you get the hang of things you wont need to do it.
Hope this helps.