Yes, the exercise-sleep connection is important for me as well. I mustn't exercise in the evening though because it gets me in that "thrill" mode where I'm wide awake (it feels like the only time actually when I feel awake..) morning or noon sessions work best for me. I'm self-employed so that is one of the benefits of having an unstructured work day, which apart from that I guess is dangerous for someone having ADHD like myself...

I've been on a vegetarian diet for about 10 years and it helps me with attaining more of an "inner calm" / reducing my constant inner agitation but that wasn't the reason why I picked it up originally - it's just a very welcome side effect for me. I could definitely improve on the health side especially when I get the blues, like I've been having for the last couple of months - I tend to binge excessively on sweets (which for me is worse than being on too much coffee in terms of ADHD symptoms) and processed junk food. I feel really great on low GI foods, so usually I eat lots of beans, fruits and vegetables. I also try to take my vitamin b12 supplements as well as my ground flax seeds regularly (omega 3) and have some organic eggs or cheese now and then. I've been on half-year long, strictly vegan diets twice over the years but ran into health issues (iron, vitamin b12 deficiencies -> anemic) each time probably because my discipline and knowledge were limited then.

I feel there is so much chance involved with picking up the right habits - e.g. if it weren't for Vibram's Five Fingers (I know they are not as healthy as they were advertised but I simply love the feeling of running "barefoot") and all the quantified self apps on smartphones I probably wouldn't be running today. It's all the little things that keep me motivated.