Get a job there first, it's not hard to get a sponsored working visa and Swiss has a high amount of foreign workers. Work there for 10 years then have the canton vote for your citizenship, if it's a big canton it might just be a committee; they'll inspect your house to make sure you are Swiss enough. You should master one Swiss language quickly (whatever canton you are in), and should probably brush up on another.

Edit: it might not be the canton that votes for you, but the commune. I get these confused all the time.

Just keep in mind you may get a fine for taking a shower late in the evening. And that you most friendly neighbor will turn into a snitch after any violation of yours, especially since you're an auslander. I mean, Switzerland is a lovely country, but some laws regarding cohabitation around there are really anal. On the flipside, whenever my neighbor starts mowning his damn lawn when I'm healing my hangover on sunday, I wish I was there. Grass is greener on the other side. In general, it's a gorgeous country.