In Matthew Chapter 6, Jesus says to pray like this: “Our Father, Who art in Heaven, hallowed be Thy name; Thy Kingdom come, Thy will be done on earth as it is in Heaven. Give us this day our daily bread; and forgive us our trespasses as we forgive those who trespass against us; and lead us not into temptation, but deliver us from evil. Amen."
Catholics say the "Our Father" prayer at every Sunday Mass.
I bought the "Catholic Book of Prayer" pictured on the left from Amazon for well under $10.
Although some Protestant Christians try to twist the scripture about vain repetition which is taken out of context when Jesus himself clearly commanded us to pray the "Our Father" and Jesus himself prayed the same words three times in Matthew 26:44 "He left them and withdrew again and prayed a third time, saying the same thing again."
Below is a Catholic prayer that is worth saying with meaning and worth saying often:
I Forgive Everyone
Lord, today I choose to forgive everyone
Because You have forgiven me
I forgive my parents, spouse, children
For any unlove and negativity
Knowingly or unknowingly bestowed on me.
I forgive my brothers, sisters, and relatives
Whose past negative actions
Continue to affect my life today.
I forgive friends and neighbors
For all wrongs ever done to me
I forgive the one person in my life
Who has hurt me the most
The one most difficult to forgive
As I forgive everyone today
May they also forgive all my trespasses.