To @zaccohen:

I do a lot more than "show up". I'm not an attorney but if he wasn't on his "game" while working on my case I lose. If I'm not on my game every hour of every day, I potentially ruin many thousands of dollars of material as well as a client's project.

So, yes, to answer your question, I try to be on my game every day for 8-10 hours a day.

If my performance was being evaluated by my boss for work I did on 30 out of 365 days, I'd be put under similar scrutiny, I'm sure.