Tony Fadell spent the first ten years of his 30-year career in Silicon Valley failing miserably, before leaving his mark building the iPod and iPhone and starting Nest. He learned the hard way that throwing away the old and starting from scratch is not always the optimal route to success. Sometimes old school guidance provides the necessary wisdom, whether you’re looking for your first job, contemplating a career change, mapping out a start-up or selling a company. What you need at those junctures is a mentor, someone who has been in the trenches and can give it to you straight.

Tony now leads the investment and advisory firm Future Shape, where he mentors the next generation of tech start-ups that are working to change the world for the better. He joins us at Hay to talk about the importance of great mentors, how to deal with terrible failure and phenomenal success and why he believes that the world’s first tech trillionaire will be someone who helps to fix climate change.