SEO: getting consistent traffic by writing AWESOME content about your keywords (there’s a phrase “length is strength” in SEO and this paid off big time for me). Maybe you’re doing videos or an eCourse, but I found blog posts WAY easier to update which means less maintenance. The biggest factor by FAR was the time I spent meticulously creating my tutorials… which eventually resulted in a sudden 3x increase in SEO traffic
My conversion rate went from 2.5% to 8% just by including Facebook polls where SiteGround was rated #1, along with a few Twitter screenshots and Facebook conversations. Whether it’s Amazon reviews or Facebook polls, you NEED to include outside opinions – that’s why I don’t like collecting reviews on my website – they look biased. But you can use WP Review Pro to do this, allowing people to review the product/service on your site and get those review stars.
If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.