One must do in Zurich is a visit to Sprüngli to try their "Luxemburgerli" (little Luxembourger). In 1957, Camille Studer (from Luxembourg, nowadays a very successful businessman in other areas) participated in a competition at Sprüngli by creating these macarons. Ever since they have been a huge success. Sprüngli release new flavours on a regular basis.
My first Luxemburgerli: I bought a small box at the Sprüngli flagship store on Paradeplatz and I told the sales assistant that I was from Luxembourg. She kindly gave me a free macaron to taste. Very sweet, literally! I think that their initial name baiser de mousse (foam kiss) is an appropriate description. They are much softer than those from Ladurée. I don't want to say that one is better than the other; Luxemburgerlis are rarer to find because they are only available in Switzerland and Dubai.
On my last day I had lunch with a friend at Hiltl, the first vegetarian restaurant in the world. The concept is the same as Tibits' where I had eaten the previous days, except that there is much more choice at Hiltl. The selection is huge. A heaven for vegetarians. As it was very hot, I had mainly cold bits.
Another Zurich-based friend recommended that I go to Im Viadukt, where you find clothes, furniture, food, restaurants and so on. It was worth a visit - unfortunately some shops had their day off when I was visiting.