I find always keeping the work open makes it easier to continue working than putting it all away and then reopening it later on.
I think ADHD people need a nap in the middle of the day more often. They seem to have a smaller amount of reserve energy, but it fills more quickly.
I know that I died mentally at 2 PM, but I would get a burst a 4 PM and work like nuts until 6.
I would schedule m life around not having meetings mid afternoon if I could help it.
And, I did have a couple of incidents when I told people who were doing stupid things not to do them.
Your thinking is linear. Sometimes I have to “Power Through” to stay awake. That usually takes about a half hour, but if I can get 5 minutes shut eye sitting upright in my chair that works as well!