<p>Although note that reading will not serve a “self help book” sort of function. The most important line in “Existentialism is a Humanism” is “we must remind man that there is no legislator other than himself and that he must, in his abandoned state, make his own choices, and also because we show that it is not by turning inward, but by constantly seeking a goal outside of himself in the form of liberation, or of some special achievement, that man will realize himself as truly human”. Reading Sartre will give you philosophical backing for that belief that what others tell you to do whether via the guise of religion, authority, or “common sense” is not the way you should live your life - for it denies the freedom of choice inherent to the human condition. Though that aforementioned quote says that “turning inward” ought to be avoided, I do think that thinking about what you find personally valuable should also occur and may be essential to finding what you personally find valuable.</p>