Joan mentioned that her lack of management skills when she and her husband first started out in business.  She uttered the phrase “Adapt or die”.  I found this book on leadership with the same title and plan on reading it.
Joan used to own the Starling Diner in Belmont Heights, California and it appears the menu has not changed much.  One of my favorite breakfast spots in the country.
In describing the menu items, Joan spoke of Sacred Cows on the menu.  She wasn’t suggesting a lack of beef on the menu.  Rather, the idiom “Sacred Cow” - a firmly held belief that is rarely questioned and is largely exempt from criticism or opposition.  Here is an interesting take on questioning everything and not getting caught up with Sacred Cows.
Here are several sites for how to do water marbling including Step by Step Instructions and this site about Suminagashiand this explanation of Turkish Ebru.
Joan is learning to play the ukulele via YouTube, including lessons on Harvest Moon and Hallelujah.  Here are covers of Harvest Moon and Hallelujah
Joan can be found on Instagram at @gomarbley or check them out at Gomarbley.com