What Difference Does a Prayer Make?
I think efficacious prayer isn’t about getting. What you may want is an answer to a problem, or guidance about a job, or even the right numbers for winning the lottery. But really productive prayer is whatever makes you or me more fit for the Kingdom. Norman Pittenger, the late theologian, author, and seminary professor, said that praying makes you want what God wants. So prayer, whether done or spoken, whether chanted or handsprung or danced, makes people different. A praying person is not like one who doesn’t even whisper “Amen.” Prayer, if nothing else, is a blessing to the human personality.

--Kristen Johnson Ingram
From Beyond Words: 15 Ways of Doing Prayer