Work for only 3 hours a day, but everyday
Historically, working 24 hours a day (I include sleep because after a certain number of hours you even dream of code or your business) for 1 year typically accomplishes more than working 3 hours per day for 8 years.  Or 1.5 hours per day for 16 years.  There is just some kind of economy of scale.---------EDIT:  I got downvoted.  Come up with whatever standard of productivity you want (ANY standard that you want) and adduce a single human who in 16 years times 90 minutes per day accomplished more than I can find a counter-example of someone doing in the same field in 1 year.  1 year of 24 hours a day strictly dominates 16 years of 90 minutes per day, and you cannot find a single counterexample in any field from any era of humanity.  Go ahead and try.oh and by the way, in 1905 Einstein published 1 paper on the Photoelectric effect, for which he won his only nobel prize, 1 paper on Brownian motion which convinced the only leading anti-atomic theorist of the existence of atoms, 1 paper on a little subject that "reconciles Maxwell's equations for electricity and magnetism with the laws of mechanics by introducing major changes to mechanics close to the speed of light. This later became known as Einstein's special theory of relativity" and 1 paper on Mass–energy equivalence, which might have remained obscure if he hadn't worked it into a catchy little ditty referring to an "mc".  You might have heard of it?  E = mc^2?  Well a hundred and ten years later all the physicistis are still laying their beats on top.https://en.wikipedia.org/wiki/Annus_Mirabilis_papersYour turn.  Point to someone who did as much in 16 years by working just 90 minutes per day.Closer to our own field, Instagram was sold for $1 billion about a year after its founding date, to Facebook.  Point out anyone who built $1 billion in value over 16 years working just 90 minutes per day.