When a billionaire investor reveals the secret of their success, it’s worth taking notice. So, it was fascinating to learn recently that Warren Buffett, the hugely influential business magnate, used presentation training to overcome his fear of public speaking. The CEO of conglomerate Berkshire Hathaway was talking to graduates about the importance of honing their communication skills, as a way of investing in themselves. His view is that excellent communications skills can increase your net worth by as much as 50%. So, he considered presentation training to be a shrewd investment and his net worth speaks for itself.