I have a two-prong strategy:

1) Give up 90% of the knowledge for FREE via YouTube, Social Media, Blogs, etc...

2) PRICE that 10% high enough, so you continue to give that 90 for free...

This will require that you ditch the concept of "hourly" rates.  that last 10% is very personal and customized, therefore it deserves a well thought out plan. 

Here are some videos I have about pricing and adding value:

https://www.youtube.com/playlist?list=PL8LZsiw8a1ztwCXYtBCuMknieyOvzKT0V&spfreload=1