Made nice money with my website twice (with not much work), how can I make it constant?

I have a small blog with just a few short articles. I have an article that nicely fits with the theme of a larger subreddit on Reddit. I posted to that subreddit twice so far with that link (with a couple of months in between) and it made front page both times. It's not a very good article and is mostly good because of the pics. I made $70 both times so around $140 for those two posts (200k visits).

My question is, how can I make this constant? I cannot post my blog posts all the time on…

Made nice money with my website twice (with not much work), how can I make it constant?