I am nowhere near a SEO Expert but I have worked very closely with one and I can tell you for sure SEO doesn't mean what it use to 4-5 years ago.

Please check this article - http://entm.ag/1O5dTax

You need to stop thinking SEO and start thinking much broader and out of the box. Like Humberto very well said here "Think of it as an ecosystem".

Think about Social Media Optimization (SMO), Conversion Rate Optimization (CRO) and so on.

It's not about how many pages of content you create for google to index. People don't have time to read so Instead you should think about how little but high quality content you create that users love to read and share. It could be a Video or Infographics.

You can schedule a free 30 mins call and I can give you some insights about SMO and CRO which will help you create quality landing pages. As far as my background you can check my profile, in nutshell we recently released a CRO Landing Page Template, so please check it out http://bit.ly/1PlzZSr