This site in NOT about making money from your blog, it’s about why blogging will make you money. I believe a business that blogs correctly will make money via sales and referrals and the increase in contact with your customers.
However, if you want to make money directly from your blog, there are a few ways of doing it. Some of these links go back to another site of mine, Life Goggles which provides further details.
The amount of money you can earn is limited by two factors:
1 – How much traffic you have.
2 – How well you can monetize that traffic i.e. how you make money from your readers.