What do these four things all have in common?
They are all good for ADD and ADHD, and–
they reduce stress, lower blood pressure, and have antidepressant effects.
there is variable amounts of scientific evidence supporting each of these, most for prayer and meditation. The prayer has other effects as well, and not only spiritual. Heart patients who were prayed for tended to do better. I find meditation very difficult ( I have ADD, you see) but helpful, and suggest the simplest kind, nothing fancy. On a good day, I can meditate for almost 15 minutes – on a very good day.
Lowering stress improves ADD and ADHD symptoms and makes life more pleasant too.