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How to manipulate people
Take an acting class.
A big part of manipulation is learning how to master your emotions and make other people receptive to your contrived feelings. If you want to know how to appear more distressed than you really are, or to use a variety of other emotional techniques to get your way, then taking an acting class is a perfect way to improve your powers of persuasion.
Don't tell other people that you're taking an acting class, if you're only doing it to learn how to manipulate people. Otherwise they may grow suspicious of your tactics instead of believing you.