At this point you are 20-30 minutes in and if you have written something interesting you will gain natural traction. If not, there is really nothing anyone can do for you.

While this isn't a surefire way of getting on the frontpage of hacker news, I've done it this way about 4 or 5 times and it has worked for me.

I wrote a post called, "How To Win A Hackathon." Here are the google analytics after being on the front page of hacker news for a few hours.

Screenshots for proof: