It is Monday night. You need your mom to sign a form for work. It is due tomorrow. Your mom is talking to your dad about the electric bill. What should you do?
Wait for them to finish talking.
You are at work. You want to take a break. Your boss is helping a customer. What should you do?
Wait until your boss finishes. Then say, "Excuse me. Could I take my break now?"
You need to get supplies from a coworker. You find the coworker in the back room arguing with another coworker. What should you do?
Wait and come back or find someone else to help you.