Don’t just take the research and ideas from others, do your own original research based upon the actions taken on your site and the results in the SERPs you obtain. There are so many niches on the web now that you can easily break off and become authoritative even in traffic trading (for adult sites for example or lead gen sites). Just experiment, see what works, get input from others and come up with your own theories of SEO. The blind leading the blind is always bad, listen to the experts only and listen to your own passion of SEO/SEM learning and you will constantly evolve new SEO tactics and techniques.