How to invest money, how to make friends in important circles, to be encouraged to speak the truth even when it was inconvenient. How to use credit cards smartly, how to not make anyone your friend and spend money on them. How to behave on a job, how to settle conflicts wisely, how to negotiate your salary or your work value. How to not give people your personal infos in you interviews. Not to underestimate yourself.
Not to think people as gods when they did you even small favors and made a big thing out of it. How to dispassionately analyze a topic and then conclude it. To learn to say no. To not always say yes because there was public pressure on you, even if you didn't agree. To disagree with respect. To be able to back out of a disagreement/argument and not lose your sleep over it. To know that you have self respect and its worth something.
And perhaps much more.
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Yasir Nadeem