do it the easy bernoise style: sure you visit the *Bärengraben* (yes it's small - but soon the poor bears gonna have a bigger new terrain with access to the river) and afterwards stroll through the old village, do some serious shopping (or windowshopping if low on budget), walk by Bundeshaus (Swiss Parliament) stop at one little charming cafes/bars on one of the small streets called "Gassen" and drink a local beer, white wine or cappuccino - generally take it nice easy in swiss capitol city.