Two suggestions are:
-- ask the previous occupant for a copy of their utility bill (for each utility), so that you can help the utility company track the location by using the former occupant's account number
-- go outside and copy down your meter number (for electric or water) so that you have it to give the utility company when you get them on the phone
Here are the numbers:
-- PG&E -- (800) 743-5000
-- Cal-Am Water (888) 422-5261 or 237-1333
-- Comcast Cable internet & TV (888) 823-4281
Hope this is helpful. Welcome to the area!