I've stumbled upon a book that parallels my own teaching on prayer. And since my own book is bogged down or delayed, I suggest you pick it up. John Main (deceased) and I've read much the same historical material and come to similar conclusions and practices drawn from the wellspring of historic Christian spirituality. From the Amazon.com review:

This is his classic book on how to practice contemplative prayer, or Christian meditation. Stepping aside from the busyness of our daily lives and being still in the presence of God is the key to discovering our true selves and knowing God as 'the ground of our being'. This book offers a twelve step programme in learning meditative prayer, but as the author says, it is not so much about mastering a set of techniques, or escaping from life's challenges and difficulties, or cultivating a self-conscious piety. Its purpose is to teach us how to be at peace with ourselves in order that we might let the presence of Christ flood our whole lives and our relationships.