This is a reread for me as I have paired it with my reading of Letters by a Modern Mystic by Laubach in the past, but it is good all on its own, and we have our Kingdom training groups read it every time we do this curriculum, and people usually really like it! We pair it with reading The Practice of the Presence of God by Brother Lawrence which I have read on a regular basis over the last 35 years. Laubach was like a modern day Brother Lawrence, but practicing God's presence in the midst of real life rather than in a monastery.
Here is a PDF download: "The Game with Minutes"
(the link I had before was not the whole thing)
Here is a PDF download of Letters by a Modern Mystic
Here is a helpful summary of it by Dallas Willard if you are not convinced of its importance:
For years, I had read quotes by Frank Laubach everywhere. Willard and Ortberg both quote him. I finally thought it would be good to read him directly a few years ago. OH MY!
Here is a blurb about him and this essay from Amazon:
Frank Charles Laubach was an Evangelical Christian missionary and mystic known as "The Apostle to the Illiterates." One of his most widely influential devotional works was a pamphlet entitled "The Game with Minutes." In it, Laubach urged Christians to attempt keeping God in mind for at least one second of every minutes of the day. In this way Christians can attempt the attitude of constant prayer spoken of in the Epistle to the Colossians. The pamphlet extolled the virtues of a life lived with unceasing focus on God. Laubach's insight came from his experiments in prayer detailed in a collection of his letters published under the title, "Letters by a Modern Mystic."Since God has for my focus to be "Ceaseless Abiding in Emmanuel" this year. I will be reading another book by Laubach, Prayer, the Mightiest Force in the World, soon.