Well, I'm late to this thread, but Every day can be a first day. I don't want to squat 300LBS, or be a big muscle man. I just need to lose weight. My hardest thing I find is fitting even 30-60 minutes in for a run. I'm trying to get it moved into the mornings before work (at work 6:30, but I have 1 hour commute), but gossh darn that is hard. By the time the kid goes down at night I don't want to miss my time at night with the wife (id down near 9pm, gotta be asleep by 10:30), so its tough.
Three nights missed with your wife a week could possibly mean several additional years with your family. Just give it a try.