Sometimes the best way to pray is to use the words of Scripture directly. Here is an example from Luke 11.
2 And he said to them, “When you pray, say:
“Father, hallowed be your name.
Your kingdom come.
3 Give us each day our daily bread,
4 and forgive us our sins,
for we ourselves forgive everyone who is indebted to us.
And lead us not into temptation.”