What governs your decisions?

Every day we have to make choices that effect our lives. Now not every choice will have a major impact on our lives. Some simple choices such as whether to eat hamburger or a chicken sandwich is simple. Those choices may not have major effects on our lives but will effect our lives. Then there are the choices like our jobs or places to live. These choices are governed by outside circumstances as well as those things we think are important. For some it is their religious beliefs that govern how they make these decisions. Still others use other means to govern their decisions. I have heard some say that make decisions by asking what is best for me. They make decisions that are only important for themselves. They don't care about other only for themselves. So when you make decisions who do you take into account?