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.
Without doing anything, things can sometimes go more smoothly just because of our peaceful presence. In a small boat when a storm comes, if one person remains solid and calm, others will not panic and the boat is more likely to stay afloat.