I think how or if you promote your posts depends a lot on what exactly that post is about. Who your target audience is, and whether there is a need to push it out there.
For example, my output varies a lot in the type of content I produce. Some is sports related (usually AFL), some is Steem Monsters related, some is contest related and some is just life in general - then there's the ones that combine one or more of these elements as well.
Each "genre" of posts have a different target audience, and even a different desired outcome.
Some I'll post on Twitter (not many though), some I'll share with a few mates via an SMS or two, some will get a run on Discord (and the channels I promote in will vary a lot there too), then there's the hashtags, trying to make them relevant, without your blog being lost in a sea of shitposts that are tag-spamming is always a challenge.
So really, it does vary for me a lot, but I also find that in the time I've been here, my post types also picked up some organic followers (I think this has been helped a lot by trying to engage with people by replying to comments or reciprocating by commenting on their own work.
Seems like your doing good :0)