I want to be self-disciplined

Tonight, I pushed my father into the room, pulled his ear to my mouth and whispered, let me watch TV tonight? Dad said softly, ok, but write a diary after reading it. I said happily: OK! I see. Then, I quickly turned on the TV and began to be fascinated. Dad couldn't help laughing when he saw this photo. I watched, watched, and lost track of time. Look at the time later, no, it's too late to keep a diary. Through this incident, I understand that I must be self-disciplined in the future, otherwise it will be late.