One way to combat the "what good would it do" (what I call "don'tgiveashitness") is to change your outlook from one of RESULTS ("What good will it do in getting my marriage back?") to one of DOING THE RIGHT THING.
Rather than try to predict whether or not something will help turn your marriage around, start trying to live each day -- hell, live each SITUATION . . . from a standpoint of "What is THE RIGHT THING TO DO in this situation? What would God Himself have me do, if He were standing right in front of me?"
It's spirit-building to go to bed at night knowing "Today I did my best to live my life the right way," and let the results be damned for the time being.
