My tip - this has been a wonder for me. I have for a long time (unknowingly because undiagnosed) had the ADHD shower aversion - don't like getting in, don't like getting out, like the h20 when I'm in it. Have generally showered only once or twice a week. So looking at the cold shower every day as I see it in the behaviors and hearing Jim talk about it - I guess it was in the recent new challenge - I forget the name . Anyway I have found the shower and the abundant dopamine it yields life-changing. And yesterday when I didn't, I felt the difference.