Let's say I create a landing page that has an enticing sales pitch for an eBook that I'm trying to sell for $5. Obviously I can use SEO to gain organic traffic and after a couple of months rank for keywords and start making organic sales. However, before that what are some ways to effectively get the word out about my landing page and make some early sales? I've heard commenting on Facebook can be pretty successful, same with posting on forums. What're some other methods?