Fellow ADHD here. A while back I downloaded a bunch of "Day in the Life" videos off YouTube of people accomplishing the type of productive stuff I need to do everyday then I used iMovie to splice together the best relevant parts starting with getting out of bed, going through the day and ending at night with getting back into bed. Now when I hit a rough patch where I can't accomplish anything I just start the video as soon as I wake up and follow along, going through the motions. This has had the greatest impact on me actually getting things done than anything else I've ever tried.