When you have no attachment to the outcome, the anxiety disappears. You then enjoy the process of what you are doing and become free and creative!
If you love what you do, your doing is your passion. You become completely immersed into doing what you are doing and you give your 100% to creating a superb product or service. Then you let go!
Results and outcome are by products of quality work.
If you focus on producing quality, results look after themselves. If you are too attached to the outcome you create anxiety, worry, stress. The anxiety then takes away all the energy leading to less than optimum product or service which them translates into poorer outcome.