Massage therapist: Cash, up to the cost of one session
Personal trainer: Cash, up to the cost of one session
Hairstylist/Colorist: Take the cost of one visit divided by each staff member who works on you and give it as an additional cash gift
Babysitter: Cash, in the amount of one evening’s pay; and have your child make a small gift
Barber: Cash, up to the cost of one haircut; or a small gift
Client: A box of chocolates or small gift -- no cash!
Pet groomer: Cash, up to the cost of one session; or a small gift
Doorman/Super: $20-$80 Cash tip
Manicurist/Aesthetician: Not necessary, but can give an additional cash tip of up to the cost of one session
Mail carrier: A small gift under $20, no cash -- they can’t accept it
Garbageman: $10-$30 cash per person or a small gift for private service (check city regulations to see whether it’s a municipal service)
Newspaper delivery person: $10-$30 cash; or a small gift
Dog walker: Cash, up to one week’s fee; or a gift
Contracted handyman/Plumber: Nothing (sorry, but he’s contracted to help)
Doctor: Nada -- it’s unethical to tip your doctor at any time!
5 New Year's resolutions you shouldn't bother making.
8 celebrity albums you should never, ever buy.
-- The Nest Editors