Every salesperson in the tech field has had the experience of "Do a demo, lose a sale".  Terry Gold, a new entrepreneurial blogger at the Kauffman Foundation's eVenturing blog, has a great, hands on set of recommendations for great demos!  I'm a believer in pointing to people smarter than I am, so enjoy Terry's advice!

Along the same lines, the lifeblood of entrepreneurship is the ability to capture your audience's attention and communicate your message. This is NOT easy, but it is CRUCIAL for the entrepreneur.  At the blog, "Creating Passionate Users", they have a great post on Better Beginnings:  how to start a presentation, book, article....that is definitely worth a look