This is the first practice of this part.
Almost every good deed has a self hidden in it. The self that wants to be thanked. The self that wants to be seen as kind. The self that keeps a quiet account of all it has given. Even the self that wants to feel spiritual.
None of this means you should stop helping. It means you can help and watch at the same time. That is the practice: to serve, and to catch the self that wants payment.
The simplest form is the deed nobody sees. Help, and leave before you are thanked. Give, and do not mention it. Then watch. The self that wanted credit will show itself, often sharply. That is good. You have caught it.
Over time something changes. The giving gets lighter. It stops being a performance, and it stops tiring you. The books say that service done this way is one of the surest ways the selves lose their hold.
Serving is not only great acts. Most service is small: listening fully, doing the dull job no one wants, being patient with someone slow. The size does not matter. The self behind it does.