You will get plenty of tips for this online. Few tips from personal experience
– DO NOT FORGET to nuetralize remote keys on your old car if you have programmed them.
– DON’T fill up as usual if you plan to trade for the CASH program in a short time; not need to get that oil change as well.
– Take the documentation required to the dealer – 1 year worth of Insurance, Registration and Title.
– Priuses are going out fast. The dealer might say he has one coming in the color you want; but when you get to test drive he might have another. Insist what you want and put a small deposit if you are keen on that particular one if you don’t want to wait.
The above could have saved me another $50!