Is it useful? Will it help me make use of the person and work of Jesus? Can it help me fight against the "unholy trinity" of the devil, the world, and my own sinful flesh?
Is it doable? Can it be taught and learned in a "clear and simple way"? Is it a practice that I can easily start and do, without any frustration? Is it simple enough for a child to learn, and yet, profound enough for me to practice every day for the rest of my life?
Is it reliable? Does it consistently deliver the person, work, and gifts of the Triune God? Is it rooted in the Scriptures? Will the practice serve me for a lifetime, without fail?
Is it memorable? Can I learn it quickly and use it easily? Is it something that will last throughout the entirety of my life and not just a passing season?
Is it repeatable? Is this practice something that I can keep coming back to? Can I make use of it day after day, week after week, year after year?