What are six principles for ethical persuasion? These by Dr. Robert Cialdini, professor of psychology and marketing at Arizona State, have become classic.

How can you increase the effectiveness of your sales letters? An article on this site, created by a successful Web entrepreneur, gives you 10 good tips.

How should you format your proposal? Consultant Deiric McCann offers advice for creating a “winning structure.”

Find more advice and resources at Bizcom Tools & Tips > Persuasion & Proposals.