I think you should use Financial Samurai to raise your passive income. You’ve already proven that you writing 3 articles a week is enough to not only sustain the site but grow it. Why not have more guest writers post articles? Since you started with the extra post each week I’m guessing traffic is above your normal growth rate. Leverage that up with more posts and my bet traffic will continue to grow.
I’m a 45 year old business owner who also has focussed on diversifying my income streams. I have a short term vacation rental in Florida that I bought for $390k in 2012 and net rental income for the last three years has been growing steadily. 2015 I am at $70k gross right now but should end up at $80-85k with net around $45k plus we use the place about 35 nights a year.
An obvious example is over exposure to bank stocks, which have been excellent investments for over a century.  Though a foundation of most portfolios, bank stocks do involve more risk at certain stages of the economic cycle than many realise.  Being less exposed to bank shares in the last few months could have preserved some capital.  So, a more diversified approach can help mitigate some of these risks.