A good question to ask oneself is: “How do I live my life differently because of my religious beliefs?” Or, put a little differently: “If I didn’t believe X, how would my life change?”
Personally, I don’t think I’d engage in much vice, since gross sin is not advisable even if one’s aim is temporal happiness. I guess I’d not be writing posts like this if I were not Christian, nor would I go to church, or teach my children about God, or find interest in reading the Bible or thinking about theology. I wouldn’t pray, I suppose, though there is an earthly case to be made for prayer too. I would not give money to charity, and I would spend a lot more of my income— that is perhaps the biggest behavioral change I would expect.