This book is helpful enough that you should buy a copy and expect to refer to it occasionally. Where it helped me the most is the etiquette of tipping. On one of my last dates, I was annoyed at the waiter's insufficiently attentive service, so I wanted to withhold any tip. My date insisted I tip him just because of servers' negligible pay. I did what she wanted, and eventually learned from this book that I was wrong and she was right; waiters and other people giving service should be tipped something whether they give good service or not, and the well-mannered response to poor service is to give a smaller tip.