Grown-ups can demand all they want that things be done within a certain time. They're deluding themselves. Different people take different amounts of time to do something.

Experience, energy and a healthy body and mind must conspire to make an individual work toward optimum results. If one or more of these are inaccessible it will take more time, schedule be damned.

I've found that in spite of their age grown-ups are often unaware of these simple facts.

I aint fooling around here. I honestly believe in what I'm saying. And to sum things up remember this: Do your best to work as efficiently as possible, but don't stress. Work is work and should, among other things, provide satisfaction in the knowing that ones efforts are needed and appreciated.