The last year reminds me:
1. The biggest enemy to self, to movement, to health is not criminals but a good series on Netflix. The enemy is the algorithm.
2. Sugary drinks and processed meat killed more people than Corona virus and crime in the last two decades.
3. Movement done in the same way over and over again leads to expertise. Specialized expertise is an investment asset with excellent returns but high risks and with no hedging option. It is very worthwhile to diversify the investment portfolio.
4. If I remember myself, almost everything that hinders, helps.
5. Training is not an option, it is a folk religion (but, see section 3).