I clearly recall back in the late 60s when I was taking college courses in nursing that one of the best things to help your brain recover better if you experience a stroke is to use you non-dominant hand for every day activities. Writing was one. This is one thing I practice often.
This too can be an exercise that veterans who have had TBI can practice to overcome the problems they have to deal with daily. It can help PTSD and aphasia too.
Now here's that suggestion again, 42 years later.