Yours is the universal question for anyone transitioning from one airplane to another. I'm sure there's plenty of gouge out there, but why not start with the usual stuff. Learn all the limitations and memory items for the emergency procedures. If you know all that stuff on the first day of class, you'll be well on your way to a successful transition. Good luck. I always wanted to fly the 75, as in my opinion, it's the second best looking commercial jet around. Right behind the DC-8-73 that is.
JJ