If you were to ask any of the top copywriting pros who they've learned from - one name is sure to be repeated over and over again -- Robert Collier.
In the 1930s, Robert Collier was able to sell just about everything from train carloads of coal to men's clothing simply by using the power of his pen. And right now I'm going to share with you 2 of the most powerful letter concepts he repeatedly used to sell millions!
One of Collier's most successful letters was his "will you do me a favor?" letter. It was based on a story he read about how a manager of a company asked a competing business for a favor, which started a relationship that blossomed into the two companies joining together.
Collier thought this same idea might work in print...and boy did it ever!