When my husband and I moved into our first house, our closing lawyer handed us a piece of paper that just read "Joe" followed by a phone number. It was the name of a handyman—and no, we didn't need to know his last name. Within a week of moving into our charming 80-year-old Tudor, our garage had two feet of water. Joe soon became a regular and reassuring presence in our home, giving us tips on sealing windows and changing air-conditioning filters. He also offered advice about marriage and