I would say first and foremost be kind to yourself, @SubArcticTundra. Strengthening your willpower begins with good self-care techniques. Set regular, realistic, and achievable goals and when you achieve them, do something positive for yourself. Too often we are our own worst enemies and by beating yourself up you actually make it harder to achieve what you really want. This is something I struggle with even though I do not have ADHD. Will-power comes not from negative reinforcement but from the positive kind. 😀