Question: How many of you tip your hairdresser? Newspaper person? Bellhops? Cab drivers? How much?
If my hairdresser or nail/beauty person owns the salon I don't tip them. But if they are employed by the salon then I do, around 10% of the total cost. Hair-washing or apprentice staff - an additional amount depending on how much time and attention they've lavished on me. Let's face it, you can have a quick shampoo, or you can have an orgasmic scalp massage and treatment!!
Cab drivers - 10% to 20% - because it's cash and quick, I usually do a rough estimate and round upwards, depending on the actual denominations I have at hand.
I also tend to ignore tip jars, which are on the whole a tacky little custom - unless I really have no need for the spare change.
Hotel porters and similar - I make a point of reading up on (or asking about) the custom in the country/area and type of place I'm visiting. I have no embarrassment about going to a concierge desk at a hotel in another country and asking what a typical tip would be for a specific service. Sometimes I'm told "it's up to you", and then I press the issue to try and find out the range that the service provider would reasonably expect from a guest.
I agree with White Dove......
I believe in "When in Rome, do as the Romans" in showing common courtesy and appreciation.