To succeed your start-up must be lean. These are key principles to apply to marketing

Around the world, thousands of new businesses with exciting new ideas for original products start up every day. To say most of them fail is an understatement. The reality is the vast majority fail. Yet some go on to transform the way we live, eat, shop, work and pay for things. Start-ups are remaking the modern business landscape by disrupting established players. It's an exciting time to work for a start-up, or even better to be a founder. However, that doesn't change the incredibly slim odds of success.

Why do Start-ups fail?

Start-ups fail for all sorts of different reasons. But they all suffer from a set of problems which more often than not are the primary reason for their failure. Professor of Business Administration at Harvard Business School, David Collis, outlines these problems as suffering from a…