Karma functions through certain tendencies. But with some awareness and focus, you can push it in the direction that you wish.

Devotion demolishes karma and leads to liberation.

Whatever you do, just check – is it all about you, or is it for the wellbeing of All. This settles any confusion about good and bad karma.  

Karma is about shifting responsibility from heaven to yourself. In this, you become the very maker of your own destiny.  

If you use your activity to entangle yourself – that is called karma. If you use the same activity to liberate yourself – that is called Dharma.