Do you believe in karma?

Karma, in Buddhism and Hinduism, is regarded as a cosmic principle of being rewarded or punished either in this life or in the next life, for our actions or deeds. From what I have understood, karma is like "reaping what you sow". That whatever will happen, whether good or bad, I brought it upon myself as a result of the things I did and the choices I made. How about you? What's your take on karma?