Neil Patel did a post at Search Engine Journal I thought I'd share.

If you've done all the on-site and G+ L optimization and are wondering what else you can do, might want to check to be sure you have these bases covered too.

7 Under-the-Hood SEO Optimization Techniques | SEJ

Whether you’re an SEO at the top of your game, or a site owner looking to do more with your SEO, this article is for you.

Most SEO advice is pretty straightforward (and worn out): Optimize your title tags! Content is king! Use a sitemap!

I get all that. And that’s fine advice. And you should do it. But sometimes we need a little bit more — those under-the-hood optimizations that can move the needle even further for SEO. I’m about to give you seven of my secret weapons for doing just that.

Just so you don’t get your hopes up too high, I’m not providing any home run hacks that are going to boost you to the top of the SERPs by tomorrow morning. SEO doesn’t work that way. These seven techniques are reputable, slow-but-steady, and hard work.

But they do work.
Happy optimizing!