Investing as a business angel offers fun and financial reward but the real world is much tougher than portrayed in the reality TV show Dragons Den. Anything can go wrong with a young company, from an unreliable product to a lack of customers, unexpected competition to management failure and, most commonly, simply running out of money. But small companies are a vital part of the economy, and the tax breaks for investing are a great incentive. And supportive investors are vital. Now is a better time than ever to invest in small companies hoping to make it big. There's a tsunami of...