Do you ever not know what to pray? Are you ever so overwhelmed with the hardships of life that your heart longs to reach out to the Lord but your brain doesn't know how to put your feelings into words? I'm so thankful that God knows what that's like. He promises us in Romans 8:26 that "the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words."
In our times of need this promise is beyond belief. Not to get into all the trinitarian stuff but it's absolutely awe inspiring that we have a God who intercedes for us and knows what we are praying when we can't even understand it ourselves.
When you don't know how to pray, remember this promise. Reach out to the Lord, even if you can't put your prayers into words. He is there for you and puts words to your prayers, hearing them and intercessing for you!