Personal experience leads to more potent attitudes. We can pass laws about behavior. Saying Becomes Believing Statements are influenced by the expected audience. Repeated statements influence beliefs. Social Movements Flag salutes, demonstrations, and other behaviors influence attitudes.
Dissonance influences behavior.
After Decisions Attitudes change to support the decision that was made. Facial expressions influence ratings of our own emotions. Too much reward undermines instrinsic motivation. Unanticipated rewards don't undermine intrinsic motivation. They may increase it.