Harvard Business Review's Management Tips of the day on 21st July included '3 Ways to Convince a Skeptic'. Overall I agreed with two out of three but I honestly don't think that stroking egos works more than the first time you try it (unless your sceptic is unperceptive and stupid). That's because 'convincing' is about more than persuading.
In the worlds of marketing, fundraising, communications, sales and lots of other organisational affairs, it's about engaging with the sceptics sufficiently so that they will act in the way you need them to.