Email marketing to supercharge your online earning

There are many ways of earning online. The easiest way, which is what I am presently doing, is be a content publisher and let entities like Google AdSense and Kontera ContentLink, etc., do the rest of the hard work. Their part is to find the advertisers and put RELEVANT advertisements (this is important because no one, neither you nor the visitors would want to see irrelevant stuff on your site)