Thought this was an interesting review of the book The Seven Principles of Making Marriage Work 

I didn't read the book but heard good things and found this helpful. Concrete action for me was being better about creating rituals and celebrating holidays

https://www.goodreads.com/review/show/550930366

Co-founder @bountycaster (bountycaster.xyz). Co-producer @ethereumfilm. Previously co-founder of Scalar Capital and product at Coinbase

Haha! These principles are such a great reminder of the effort and understanding it takes to build a strong and meaningful relationship. 
I especially like the emphasis on shared meaning and mutual respect!