NASE is the National Association for the Self-Employed. I make no recommendations for the the organization. I have a friend who belongs but I only wish to point out a resource that focuses on the small business.
"The NASE was founded in 1981 to provide day-to-day support, benefits and consolidated buying power that traditionally had been available only to large corporations. Today, the NASE represents hundreds of thousands of entrepreneurs and micro-businesses, and is the largest nonprofit, nonpartisan association of its kind in the United States.
Since its start-up, the NASE has been an important partner in the explosion of micro-businesses in the United States, supporting the interests of the self-employed with benefits and advocacy initiatives aimed at leveling the playing field between these businesses and larger corporations."