Where does one seek the do’s and don'ts on karma?

Gurudev, where does one seek the do’s and don'ts on karma?

Sri Sri Ravi Shankar: 

You should listen to your own conscience, your inner gut feeling. Don’t do anything which you don’t want others to do to you. That is the criteria.

We should do that which brings long term benefit, even if it is at the cost of some short term unpleasant situations. We should not do that which gives short term pleasure but problems in the long run. This is the criteria for karma.