As a Brit now living in Switzerland, let me tell you... you NEED a book like this. And a Swiss German girlfriend/wife to sort things out for you...
The book contains loads of useful information, but, yes, you do need to rely on sites like EnglishForum.ch for plenty more advice and tips.
The most essential piece of information will be "How much will I need to earn, to have a fairly good lifestyle in Switzerland". This country is (deep breath) EXPENSIVE.
£6 for a pint of beer, anyone ? £4 for a tiny (1 dl) glass of wine ?
Healthcare is expensive, and you MUST have it, you must have a working permit to work here, and register with your local village council, etc, etc. There are loads of tiny (and annoying) rules and laws you need to know about, before you commit serious crimes like attempting to do laundry or mow the lawn on a Sunday!!
If you're thinking of coming to live here, you need a book like this, and this one's pretty excellent.