Strength in all things is important. We must constantly be building these strengths. We can do this through reading, experience, and experimentation.
My latest experiments have revolved around gratitude practices. These experiments have really put me into a much more peaceful place. I was skeptical at first about gratitude practices, but went in with an open mind. I am glad I gave these things a try. You can learn more about my experiences here https://nehemiah.co/happy/a-most-grateful-practice/ .
Here are some strong things I have been reading lately. I recommend you read them as well and perhaps implement an idea or two from them.
Strength and Conditioning
Zercher good morning variation, something to consider implementing https://www.t-nation.com/training/tip-the-zercher-good-morning
Nutrition
Some of the benefits of intermittent fasting https://thereadystate.com/blog/2020/06/11/4-potential-benefits-of-intermittent-fasting/
Dr Rhonda Patrick on The Joe Rogan Experience discussing nutrition during COVID-19, scroll down in her post for research studies and her show notes by time stamp. https://www.foundmyfitness.com/episodes/jre-1474
Mental Health/Fitness
Thoughts on avoiding fragility https://zenhabits.net/antifragile/