an awesome list of activities based on age -- submitted by professionals -- even goes down to early infant!
@Katie Hinds Bully-proofing your kids - Starting when their son was 3, psychologist Tammy Hughes and her school psychologist husband started teaching him. At night, they'd say, "Tell me three good things that happened to you today." This helped him make the distinction between events and his feelings about them. Once he had that mastered, they added, "Tell me three good things that happened to someone else (lesson: the world includes me and other people, their feelings and actions)."
some good ideas