Memo to God: I've been demanding and demanding things from You, often quite rudely, in fact often very rudely, like an ill-bred spoilt child, but I think prayer must have made me better mannered or perhaps it's helped me grow up a little and now I should like to say politely: "thank you very much" -- not just for staying with me no matter how unpleasant I was, but for actually moving closer and surrounding me with people who care.
I believe that God prays in us and through us, whether we are praying or not (and whether we believe in God or not). So, any prayer on my part is a conscious response to what God is already doing in my life.