The complicated etiquette of tippingOne of the more stressful things about travel -- after flying, of course -- can often be insecurity about tipping. The confusion surrounding this subject was underscored last year when a Yahoo blog titled "Confessions of a Housekeeper" sparked a discussion about whether and how much to tip a hotel maid. I was surprised to see that tipping the housekeeper was not as standard as I had assumed. And the opinions on whether or not to tip every day and how much varied widely.