Figuring out when your visitor is ready to convert depends on your website viewers’ behavior, so you’ll want to conduct A/B testing to determine where you need to place your CTA. Does it work best towards the bottom of a blog page, when it slides out to the right, or does it get higher conversions at the beginning of the page, sliding out from the left?
One of the first dilemmas that you'll need to deal with when you begin to build email list is the quality versus quantity debate. Obviously, the larger your email list is, the more potential you have to generate revenue from it. However, as with most marketing activities, the quality of your leads is equally important. If you create a large email list by porting over old contacts or by buying or renting a large list, you may have a great number of email addresses. However, you may have very few email addresses that are actually leads who are interested in interacting with your product, company, or brand. That's why it's often a better idea to start slowly and build email list over time. Focus on getting the best quality leads on your email list and then let the numbers grow as your business grows. While you ultimately do need to grow the largest email marketing list possible, you also need to grow a quality list that will respond to your offers and increase your company revenue.