I learned that to build up/improve your muscular strength, muscular endurance, flexibility and cardiorespiratory efficiency you need to practice and workout regularly
I learned that when you set achievable goals for yourself, you start to show improvement
I learned how to look at my failures and figure out what went wrong, then learn from them and apply a different technique (figuring out different approaches to increasing my flexibility like stretching/yoga)
I learned not to set too many goals all at once, instead I set a few goals and easily achieved them