As I understand from GITA:
1) To do something against law, against nature's Law, against conventions, against acceptable norms is Vikarma : Things one must not do.
2) To do what one should be doing, ought to be done routinely, almost automatically, without conscious thought.
3) This third is very important. There are things which one should not do even if one can do it, even if it is legal to do it, even if it is acceptable to do such things. This is the true Karma . Here, you have to use WILL POWER TO RESTRAIN FROM DOING THAT THING.
As per GITA, as I understand, a person should be very clear about all above three things in life.
The more focus and more energy should be devoted to (3).
That brings a disciplined, principled and overall balanced life.
Haresh Raichura
7/11/13