So I’ve done guest posting – written some really in depth articles for Business2Community; CareerFuel.net; and several other high quality websites.
That didn’t do too much.
I tried blogging everyday for a while, that increased my traffic a little bit.
Then this week, after each article I’ve read on my lunch hour, I’ve left a comment – and my traffic has tripled. Look:
Unbelievable. That’s the only thing I can think of that I’ve done differently anyway.
Each comment has been ‘meaningful’ and on blogs related to MMA.
Fitness & MMA Blog - BlackBeltWhiteHat.com 
I’ve been working at it as well. After 2 months of experiments, I was able to drive 5 times as many viewers to my blog after tweaking my SEO (which includes leaving comments). Here is how I did it:
http://www.weretiredearly.com/Blog/2015/09/28/wordpress-seo-tips-for-google/
Keep up the great content!