It's a good idea to make sure someone in either the wedding party or family member has a cell phone on them on the day of in case there is an emergency and you are not available. Who can be reached by phone on the day of?
Some brides prefer to do "formals" and or bride and groom photos before the ceremony because it allows more time to really get the images you want.
Did you know it's customary to feed the wedding vendors? Most weddings span mealtimes, and because of this, at some point, your vendor(s) will need to eat. Would you prefer to provide meals for the wedding coordinator(s) or would you prefer for them to leave the reception to obtain a meal?