Taking one Psalm for a whole month requires calm development of the skill of listening. But Ken's conviction is that God loves to speak to us. It requires a conscious recognition of one's prejudices and preconceived ideas, and then a dropping of one's guard.
God, you will find, is happy to work with us where we are. Hebrews begins with an acknowledgment that "In many and various ways" he spoke in times past. He speaks the same Word, but there are still many and various ways in the speaking.
But the more I listen, the more He can say. The more He says, the more I am changed. Jim George once said: "If you need a guide for your ongoing relationship with God, read Psalms.