The answer is not more hours, it's less bullshit. - David Heinemeier Hansson

My whole thing was, if I can put in 5 percent of the effort of somebody getting an A, and I can get a C minus, that’s amazing,” he explains. “It’s certainly good enough, right? [Then] I can take the other 95 percent of the time and invest it in something I really care about.

Ignore the real world
“That would never work in the real world.” You hear it all the time when you tell people about a fresh idea.
This real world sounds like an awfully depressing place to live. It’s a place where new ideas, unfamiliar approaches, and foreign concepts always
lose. The only things that win are what people already know and do, even if those things are flawed and inefficient.
Scratch the surface and you’ll find these “real world” inhabitants are filled with pessimism and despair. They expect fresh concepts to fail. They
assume society isn’t ready for or capable of change.
Even worse, they want to drag others down into their tomb. If you’re hopeful and ambitious, they’ll try to convince you your ideas are impossible.
They’ll say you’re wasting your time.

When you yet to do 100% of what somebody wants, you need a perfect match, and it's pretty rare that you have a perfect match between what you thought people needed and what they actually need. If you try instead to do 80 percent of what they need, there's a pretty good chance you'll hit a sweet spot.