After I sold my 2nd company (to Equifax) in 2011, like you, I was looking for a good way to capitalize on the knowledge I had. I'm a tech guy (i.e. developer). I worked for Oracle in the late 80s, then started an Oracle consulting firm (TUSC) which we sold in 2008. With TUSC I travelled to Oracle Users Groups around the world presenting on various topics. I wrote 6 technical books from 1997 through 2010. So I was interested in continuing to share the knowledge I had.

In 2012 I started InteliVideo (www.intelivideo.com) to help provide an excellent way to make a passive income. We help people sell their digital products...from audio books to video lessons and more. We hear stories every day from our customers about how they are making an amazing passive income with our platform. It's SO much easier than writing a book and provides more information and a better learning opportunity for my customers.

Best of luck with your passive income journey. It's a great dream that can become reality!