products marketing help needed

I have a decent sized list in the men's self-help/dating space and I'm working on building out my follow up series. I realize my list quality and pre-sell have a major influence on my conversions, and that I'd have to do some serious testing/tweeking to optimize things.I went through many resources and also checked Small Business Video but did not get any help.Any suggestions?

Any help will be appreciated. Thank you.