So you want to learn all the best practices for using Facebook pages, ads and social plugins?

Well, you’re in luck.

Starting today and until May 20th, small business owners can enter the Facebook Big Break for Small Business contest to win a $20,000 cash prize, free one-on-one consulting and a free two-day marketing boot camp at Facebook headquarters in Palo Alto.

To enter the contest, small business owners need to visit Amex’s page on Facebook and provide brief answer about their company.  Amex will pre-select ten finalists and then Facebook fans will vote for five winners.

Amex has done this before.  They teamed up with Facebook for an event called Small Business Saturday, which offered free advertising to 10,000 small business owners who signed up to participate.