Cutting middle class tax rates is the #1 most effective way to do that. Most small business income is taxed at the personal rate, and most small business owners are solidly middle class (only 2% pay the top income tax bracket). Not only would this allow middle class small business owners to have more capital to expand with, it would leave their customers and employees with more of their hard earned money, so that they can save, invest, and consume (with consumption being the most important factor to most small businesses).
I'm also all for getting rid of burdensome regulations, but aside from Obamacare, I've yet to see an list of any unnecessary overly burdensome regulations which are harming the small business sector, so I'm not so sure that regulations are as big of a factor as many people make them out to be.
I'm not for any special incentives, because that means special deals for special folks, and we've already got enough crony capitalism in this world. Incentives generally mean subsidies of some sort, and subsidies distort the market and result in less than optimal investment decisions and resource allocations.