I confess. I'm horrid at tipping. I dread that moment when that impersonal folder is placed discreetly at my elbow, and I begin the task of checking the bill and scrutinizing the service. I came in for a meal and I still resent the fact that I can't pay for just my meal. When I was a kid, tipping was different. I remember watching my dad pay the bill, then as we stood to go he would tuck a few bills under a saucer or a salt shaker. When I asked, he explained that our waitress did a good job,...