When they start the conversation with:
“Would you be willing to….”
“Could I ask you a favor….”
“I this is last second but….”
You don't have to agree to whatever they're about to ask (especially if it's outside of your normal work duties). Say NO, and you don't need to elaborate.
When you decide to be a “yes man” and you come in extra, or take on additional duties (whiteout additional compensation), then you set a precedent that you'll always allow yourself to be pushed around.
So next time your boss waddles over and starts trying to get you to come in over the weekend, stay late, etc etc….say NO, say it firmly, and end the conversation.
