Salesmanship Lessons From Donald Trump

Never do things for your customers and prospects in a small way. Make it big and important or don't do it at all.
Everyone likes to do business with a winner. No matter what stage of your career, you need to look like you've made it.

Bring your ego with you in full bloom. It's not enough to look successful; you need to act it as well.

Source: http://www.entrepreneur.com/sales/salescolumnistmarkstevens/article207040.html