A drop in the ocean, a change in the weather, I was praying that you and me might end up together, it's like wishing for rain as I stand in the desert, but I'm holding you closer than most cause you are my Heaven. ":O)
Moar C.S. Lewis! Prayer isn't an obligation in this case, and it serves not only God (presumably why we pray), but is also beneficial to the individual praying. Lewis recognizes both parties in the relationship and how important both God and human beings are in this dynamic.
Journaling Bible as Prayer Journal - great idea for using your Bible as a place to write notes that you can remember God's faithfulness by in later years!
Once we have called, our next step is to watch. He has never broken a promise and He is promising to show us great and mighty things we do not know. God finds joy not only in our asking but also in our anticipation that follows. Lets not rob Him of them!