Should You Write More or Promote More

They say that you should spend 20% of your time creating your content and 80% of your time promoting it? Back in August of 2013, expert marketer and entrepreneur Derek Halpern wrote a blog post titled The 80/20 Rule for Building a Blog Audience. He said: Create content 20% of the time. Spend the other 80% of the time promoting what you created.

Derek Halpern has a large following and lots of people picked up on this idea and you will hear variations on this theme of the “80/20 rule” all the time.
Is the 80/20 Rule Valid for 2016?