So much of being a product manager depends on successfully persuading and influencing others. Whether you’re presenting your product strategy, presenting a business case to the Board or talking with your customers, you need to know your subject matter: to demonstrate a good knowledge of your products and market to ensure that you come over as authoritative and credible.

A product manager who thinks they’ve got an easy ride because their product is a cash cow is probably missing the point. While failing or unpopular products have a more obvious set of problems to tackle, successful ones have a different set of arguably trickier problems