Switzerland rewards people who plan lightly and move often. The rail network is good enough that you can base yourself in one valley and still see three, and the difference between a good week and a great one is usually altitude and timing rather than budget.
Kronenhalle, Zurich — Classic Zurich dining rooms with a serious art collection on the walls. Book the ground floor.
Chesa Veglia, St. Moritz — A 17th-century farmhouse in the middle of town. The pizza room is the one to ask for.
Restaurant Bergrestaurant Suvretta, St. Moritz — Mountain lunch worth the chairlift, on the terrace when the sun holds.
Alpina Gstaad — Sommet, Gstaad — Alpine cooking at altitude without the tasting-menu formality.
Bahnhofstrasse, Zurich — Watches and everything adjacent. Go for the independents on the side streets rather than the flagships.
Bogner and the Via Serlas boutiques, St. Moritz — Mountain kit that will look right in town too. Winter season only for some of them.
Läderach and Sprüngli, Everywhere — The chocolate everyone actually wants brought home, rather than the airport version.
Late June to September for hiking and lake swimming. Late December to March for snow, with February the most reliable.
A Swiss Travel Pass covers trains, most boats and many mountain railways. Cars are a liability in the mountain towns and unnecessary elsewhere.