time and patience? ...I'm near the same view count area as you right now (on soundcloud, ...my views on youtube are closer to 1,000 a week),
...but when I look back a couple years, the only real thing that has worked is time and patience, and obviously more and more work too.
Let the people come to you. They will come. ...and I don't see google listed in your post. Google is the internet essentially... Get you stuff on the first page of a google search, and thousands will come every week. A song is kind of hard to get ranking in search engines, but use all the meta-tags and descriptions you can to let their bots know who and what you are, so they can rank you. Facebook and instagram are nice and all, but they're like children standing next to google.
...and another thing that's kinda related but really important is this game, ...catch trends before they happen. If you catch a trend early, and you make stuff for the trend before the huge crowd comes in, ...you're set. If you make a style of music for a trend that already has a huge crowd, you're too late. Get in on a trend as early as you can.