Depression and anxiety are two residual symptoms that I continue to have long after the memory and other cognitive deficits resolved. Some things I find helpful include:

Mindfulness meditation. Classes are available and there are several good books on this. “Wherever You Go, There You Are” by Jon Kabat-Zinn is a good introduction to the topic.

Yoga. A good studio will integrate mindfulness practice with movement and postures (asana).

Massage therapy.

I have also gone to TBI support groups; I find these good, but for me less helpful than the other things mentioned above. We all find our own path, so use the tools that work for you. For many people professional therapy is helpful, some insurance plans will cover this.