I know that state of mind… What’s on top of my todo list?.. Oh I got an email… It’s the first of the month today, do I have enough money in my checking account for rent? … I should start work on that task… How did my fantasy team do last night ? … 
I’ve been taking vitamin D supplements as well. I take them all year long. It was suggested to me after a blood test.
I do think it helps as it seems to be scientifically proven that vitamin D deficiency has significant medical and psychological consequences.
I’d like to say it helps me stay functional but I really can’t prove it.
I’ve never been able to be successful working from home. When I do work outside office hours, I usually go to cafés around my place (there are plenty around here… some are opened until midnight). There’s something about having people working around me that gives me energy. And sometimes I get to talk to people.
When I worked from home as a consultant, my life schedule would quickly become erratic. I would work at night and sleep during the day. People would call me thinking I’m available because i’m at home. I would take breaks and do the dishes or the laundry. I had a hard time with boundaries.
One thing that I would do now as a consultant that wasn’t available to me back then would be to find a co-working desk somewhere. You get the benefits of leaving the house and sharing your environment with other professionals without spending a ton of cash.
Now i’m off topic…
I’ve never heard of Phosphatidyl Serine before. I’m also interested in any natural supplements that could help.
Let me know if you get results and good luck!