I don't know if it has been mentioned here before, but...
I know lists, plans, and outlines are important tools for managing ADHD. I found a couple books by Karen S. Wiesner, First Draft in 30 Days and From First Draft to Finished Novel that could be helpful for some of the other novel writers out there.
I haven't purchased the second one yet, but First Draft in 30 Days seems like it could be a great tool.
It's all about daily steps and planning. After 30 days you have an outline that is supposed to be so detailed that it doubles as you're first draft.
Of course, it does no good if you never start, like me! Still, I thought I would share it with everyone here!
Good luck in all your writing endeavors!