As you find harmony with the universal laws and law of attraction you will understand that the greatest thing you can do is give to others, that our purpose here is to serve others. I love this poem:
" It is one of the most beautiful compensations of this life that no man can sincerely try to help another without helping himself.....Serve and thou shall be served."
-Ralph Waldo Emmerson.
Give without want, want for others what you want for yourself and continously find new ways to serve others better. The great secret of life. When you do, all that you desire, will come to you, it is by universal law, but serve others out of passion, love, joy and fulfillment, serve and give without worrying about what you will get out of it, focus only on giving, helping and serving. Live each day giving yourself. When you impact others, you will impact yourself!