Due likely to undiagnosed ADHD, Trello is the only way I accomplish anything in my personal or professional life. I have 3 columns of varying priority levels (to avoid being overwhelmed by one large list), "blocked" and "future" columns, "done" and "cancelled" columns, and crucially, a "working on right now" column (necessary for when I lose focus). If it's not in the Trello or in my calendar, it's not getting done.