If you've not tried it out before then go to the Cafe de Paris for Steak and Chips ... thats all they do there .... Steak and Chips but they do it very nicely .... see ... http://www.cafe-de-paris.ch/.
Also just wander around the Altstadt ( Old town ), rest at a cafe or two and sample the Ice Cream.
Take a trip out on the Zurichsee or wander through the parks alongside the lake. Its not as dramatic as Geneva with its iconic Jet d'eau but still very pleasant.