How can you best serve Humanity?

These questions are the big questions in life right? I myself have been asking them for years and I know that I'm not alone in wanting to know the answers. I have read hundreds of books ranging from contemporary esoteric thought, to ancient texts such as the Bhagavad Gita, The Tao and the Bible. All of these books had answers to theses questions and not surprisingly they were very similar. After many years of self study, meditation and literary research I have come to a conclusion. In most cases the simplest answers to life's most difficult questions are usually correct.