Ask HN: How often are you operating at 100% productivity/motivation?

Sometimes I just don't feel like working. Other times I am in flow at 100% and feel like if I didn't have to sleep or have meetings I could get everything on my plate finished.

How do others feel? Are you mostly working at your optimal productivity / motivation level? Has it changed as you got older?

Maybe it's just me but there are days I get nothing done, and when you have daily stand-ups you simply cannot say that so you just make shit up or say you were swamped in busy work.

I'm wondering if there is a better philosophy to managing people with this in mind, although I am finding that humans need deadlines and external pressure in some form or nothing gets done.