I'll contribute one too

A wife and husband had a argument that led them not talking to each other. Even if they NEED to talk, they'll use sticky note.

On one particular night, the husband ASK the wife to wake him up 3 am in the morning as he need to go to catch a flight.

The next morning he wake up at 7 am, realising he was late and before he can get angry, he saw a note sticking beside him wrote "Wake up! It's 3 am"