I'm new to SEO - but I'm on a mission and been grinding it. But here's my tip, I 'm using aHrefs and I noticed they show I have 800 good domains linking to my site. Then I check google webmaster and it says I have 510 domains linking to my site. So aHrefs is out crawling google. So I exported 1 link from each of the 800 domains from aHrefs, separated it into 8 html pages of 100 links. Then I went into google webmaster tools and told it to crawl these 8 new pages with all the links on it. 2 days later google webmaster tools is showing 618 domains linking to my site. Now that's some fast SEO juice - for what it's worth.