Founders with ADHD: what tools/tactics have you found most effective?

Keen to hear what tools/tactics/books you have found most helpful in managing ADHD symptoms (difficulty focusing/unfocusing, problems with punctuality, paying attention during meetings etc.). I've been recently diagnosed and am putting together some strategies. Things that seem to help: distracting app blockers, writing down goals and schedule the night before, body doubling. Haven't found a good solution for my tendency to multi task during meetings.