Here is just a brief list of links for your convenience:
Looking for a dinner in Potsdam?
Potsdam (and Berlin) have beautiful areas, be very welcome to visit them!
Places to buy things.
For Google Earth users: gwdaw11.kmw.
Timetable for buses between Potsdam Hauptbahnhof (main railway station) to
Timetable for buses between Dorint hotel and Potsdam Hauptbahnhof (main railway station).