Reduce the penalty of failure at the LOWER end of the economic scale, at least within reason. In the current economic client, entrepreneurship is not stifled by taxes, it is stifled by a lack of social supports that would allow prospective new businesses to try something groundbreaking, fail utterly, and not worry about having destroyed all hope of their own, and their family's future.
As things stand now, the penalties have only been removed for the largest businesses, the ones which also happen to be the slowest moving, most resistant to change, and unable to exploit new opportunities.
What next steps should be taken in the U.S. Congress to encourage/strengthen entrepreneurs?