I don't have a rule written out but I do make sure that I pray with my wife three times a day. We say morning prayer, the angelus over the phone and bedtime prayers first with the kids and then together when we go bed.
I am a small business owner (www.aquinasandmore.com) which makes the provider pretty stressfull sometimes. Fortunately, my wife helps me stay prayerful and trusting when I start worrying about finances.