Escape velocity
In aero-propulsion engineering, it has been found that the most amount of fuel per kilometer is burned when a plane is taxi-ing and taking off, not when it is cruising in mid air.
Some shortfalls of conventional wisdom
"I hereby sincerely apply for a job"
"Back in the old days"
Being humble.
A good day to take a walk.
Quieten the constant chatter in your mind that may lead you to act all the time, do your work and shut up and wait.