[ghaff]

As someone else pointed out, http://www.mrmoneymustache.com/ is popular although arguably extreme.

This is also a good general post by someone who now writes about business for Bloomberg http://www.theatlantic.com/business/archive/2011/03/10-quick...

At the big picture level though, it's mostly about living within your income and putting some money away on a regular basis. (Someone else mentioned at least 10%.) At some level, everything else is keyhole optimization assuming some sane diversification of savings--don't put it in Bitcoin or all in your company's stock. It's useful to get other things right but they're much less important in the big picture than outflow < ~.9 * inflow (after tax).