Task-shifting can be very difficult for people with ADHD, says Goodman, especially because they can get hyper-focused on finishing something and it swallows the whole day. One option is to set a timer for when you should be halfway done and finished with a task, and force yourself to move on regardless of where you are in your work.

"When I start working on a task, I set an interval timer on my phone usually every 30 - 45 minutes. When the timer goes off, I self-evaluate how much progress I've made and ask myself if I still think I can make the deadline I made."

—Jaime Allen, Facebook