I was just reading a very interesting post on Problogger by Michael Alexis:
Ramit Sethi Exposed: How He Earns Millions Blogging : @ProBlogger
He talks about an interview he had with Ramit Sethi about the importance of research. The post is long and goes into some detail about the process of putting up an online offer.
One quote that I found interesting:
"Ramit spends months (or even years) doing research and development. He spends a lot of time crafting his product and offer, and he has converted as high as 68.7%. In our industry the average is 2-4%."
It is a wonderful confirmation of the importance of research before putting out an offer.