Depending on the day of the week, by the time you get into town shops might or might not be closed. In any case, take the train to Zurich HB, take a stroll down Bahnhofstrasse, arrive at the lake, soak it in, then go and see the old town, walk through the Niederdorf and get dinner in one of the restaurants there. "Geschnetzeltes mit rösti" is what you want