How do you know if your actions are just karma or karma yoga

The purpose of karma yoga is to purify your inner self.

There are three principles of karma yoga:

1)Whatever action I am doing if for myself only. The world does not care or need any of my action. The world will continue to operate even without me. All actions I do are propelled by my samaskars. I do not have any choice other than doing action

2) No action can give you happiness.By meditating, you need to realize that you are bliss and each action is done in happiness , to express happiness, and not to gain any happiness.

3) Observe your mind before, during and after the actions. If the state of mind does not change during these three phases of action, than that action is considered as karma yoga.