The Buddha taught non-attachment as central to ending suffering, the Stoics distinguished between what we control and what we do not, and the Taoists practiced wu wei.
How to Practice
Notice what you are clinging to right now
A desired outcome, someone's approval, a plan going perfectly. Identify the attachment creating tension in this moment.
Acknowledge the desire without acting on it
You do not need to eliminate the desire. Simply see it clearly: I want this to go a certain way. That is honest and human.
Gently loosen your grip
Ask: what if I did my best and then let go of the result? Imagine holding the situation with open hands instead of clenched fists.
Redirect energy to what you can control
Pour your effort into your actions, your intention, your integrity — and let the outcome be what it will be.