My experience of ADHD includes a tendency to become distracted by thought while moving between tasks or places. I have found that headphones with an audiobook help lock my attention down to two tracks instead of half a dozen: I'm either thinking about my task, or the words in my ear. Obviously your mileage may vary, but ADHD people develop all sorts of coping methods, so my broad advice is "experiment with lots of things to help get things done, even if other people are skeptical of their effectiveness."