Unrealistic expectations

A large part of the frustration that most of us experience in life is due to unrealistic expectations. We often expect too much of life in general, and of other people in particular. By expecting too much, we just drive ourselves crazy. We keep saying that other people "should" be a certain way. They should be more considerate, more competent, more open-minded, more helpful, more sensible, etc. But people don't behave the way they "should." They behave the way they are. The sooner we accept this and learn to live with it, the less stressed out we'll be.