What do your customers want to know? There should be a problem that you are trying to solve. A good way to find a hot topic of questions people want answered is by going to yahoo answers or ask.com. Also, if there are popular forums in your niche sign up for a few of them and investigate to see what people are trying to find out. On the subject line on opt-in state a common problem people are looking for and answer it in their e-mail. The best affiliate marketer knows how to find answers to problems.

Here are 5 Things Strong Opt-in Campaigns Do Well:

• Increase customer longevity or length of time a customer remains a customer.
• Increases Loyalty.
• Increases the most powerful marketing medium, word of mouth.
• Customer revenue contribution
• Lower cost per order because marketing waste has been minimized.