Buddha said that the root of all Karma was volition, motivation, the intention behind an act. What we popularly call Karma is the result of what has gone before. It is the effect of a previous cause, quite mechanical and impersonal in its occurrence.
"This arises, that becomes" was how Buddha defined Karma.
"What's my Karma? Is it my Karma that I am healthy? that I am rich? that I am sick? that I am deformed? that I am crazy? that I am not crazy? that I am successful?" We have a lot of questions about to what our Karma is, misunderstanding perhaps that Karma is not something outside ourselves.It's not luck or coincidence, it's the perfect outcome of a previous input.
We don't have to go to an astrologer or a palmist to discover what our Karma is. Our thoughts are our Karma. Our likes and dislikes are easily seen as our Karma. There are a hundred likes and dislikes, a thousand opinions, ten thousand concepts about how things are that haver been conditioned by previous experience. All these likes and dislikes drive us from action to action, creating more Karma, more causes for future results.