Well first things first your post has got to have content that's worth reading. Nobody wants to go through a post that would make them question whether it was a kindergarten student that wrote it.
When you have that very important part down, next thing is to pay for upvotes, there's no shame in doing it, alot of people do it, not to make money, but to give their posts a little more visibility. You might write an epistle worthy of only the eyes of the gods, but if nobody with substantial SP upvotes it then best believe that even the gods of promotedpost, hottopic and huge-whale won't see it.
Finally, you could solicit some help from someone who's already recognised in steemit, that way if they share your post then alot of people are going to want to know why someone so prominent saw it fit to grace his page with your post.
If you check all these boxes and the post still doesn't go viral then maybe it's time to hit the drawing board again.