It's funny, I had the same idea. I want to buy a one month train pass and visit one canton per day for one month. Since we'll be living in centrally-located Luzern, almost the entire country can be visited by daytrips. I'll probably visit the more famous places on weekends when my wife isn't working and do the obscure places she doesn't care about during the week. By the way, I'm planning on doing this in October.