I agree with Danmac, but would like to add: live alone. Hobbies, a calm environment, and living alone help me. Of course the only way for me to really have a calm environment is to live alone.
I've tried having friendships, but found it too uncomfortable, and too demanding. Because of that I didn't want to put into it what the other people wanted to put into it. I find being solitary is best for me. I do occasionally socialize with relatives, I will talk to people when I am occasionally out running errands, I will say hello to the neighbors, and I like hanging out here at WP and Dear Abby, but I don't really want any more of a social life than that. Obviously, I am an introverted, hermit type person. I am not anti social, though, just non social, and I am okay with that. 
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau