6) Manage your battery. The CDMA (like Verizon) devices eat the battery faster than GSM/GPRS (like Cingular). If you are in an area with very weak or no signal, "turn wireless off". Otherwise it constantly sends hunts for a signal, and you will go dead in less than a day. With my old Cingular unit, I could to on a five day trip with no charger, if I don't use the phone much. The Verizon unit is good for maybe 3 days.
7) If people know you have a BB, they will expect you to answer. You will need to get used to that. I send messages to people I know have one at work, and don't hear back for over a day. Drives me nuts. Not worth having if you don't use it. Keep it on your belt, not in your bag!