The best way to make friends is to go out and do stuff you like. While you're at it, you'll often find people with similar interests there too, with whom you can get acquainted with. If you're asking how to make friends on an interpersonal level, well, that's much harder to answer, because socialization is improved through practice, and every person you meet is going to be different. Basically, there is not sure-fire way to make friends.
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It takes a village to raise an idiot, but it only takes one idiot to raze a village.