Have you ever felt that, sometimes you are wasting time? For example, you are waiting for some people, or you are on the bed and waiting falling in sleep.
I often feel that.
That is why, I looked for short prayers which I can recite whenever and wherever I am.
I forgot where I read a short prayer. It was:
“Jesus, Mary. I love you save souls.”
Besides that, there is a popular prayer: Jesus Prayer.
“Lord Jesus Christ, Son of God, have mercy on me, a sinner.”
Read here for more about Jesus Prayer.
Very nice prayer.