Karma: Five Factors of Action

Q. How should we understand that ultimately we are not the doer of our activity? How to keep this understanding always and work, because many times when we work we often get carried away thinking that actually I'm the doer (and it appears to be so)?

With some introspection, guided by spiritual intelligence from Bhagavad-Gita, we can recognize that we are not the ultimate doer. We discussed this in a previous digest (Digest78):

Q. In Bhagavad-Gita 2.47, Lord Krishna says, "You have the right to perform your prescribed duty, but you are not entitled to the fruits of action. Never consider yourself the cause of the results of your activities, and never be attached to not doing your duty."

Question a) In this world activities are performed with the results in mind and in fact the results are the motivation for one to do work. How does one perform his
activities in this world without expectation of fruits / results?