Just as a good song is dependent on "timinig," so too is prayer. And if your timing is off, then your ability to keep step with God's song will suffer. Prayer's groove is all about the ability to choose the correct times to pause. You need to find your groove to avoid stepping on God's feet as you dance and let the music move you.
God's twenty-four hour song is conducted by the turning of the earth and the coming and going of the sun. So our day's groove goes from morning, to midday, to night.