Time again there has been one business model that has proven to be successful, as stated recently by Marco Arment:
[…] the traditional style of spend less than you make.
That’s the only way to make money, short of fooling someone into buying your company for more than it’s worth.
Ben mainly cautions business owners about the dangers of firesale prices. If you own a business or are in a position to make financial decisions for a business, consider Ben's article required reading.