You can train your body to lift heavier weights or to run faster. You might decide that being stronger or faster doesn’t matter to you, and that’s fine, as long as you maintain a basically healthy lifestyle.
You can also train your mind. That has such a huge impact on your life that I believe everybody should do it. You train your mind by meditation, mindfulness, or simply relaxed breathing exercises. Whenever I give a talk, have a session with a client, present a webinar, or give a multi-day training class, I always include exercises you can use to train your mind.
You need to find some way to train your mind. You can read books (I recommend my own ;-), listen to podcasts or attend online trainings. I also have a two-hour online class coming up next Monday – you can read more and sign up here: https://vester.li/fcw.