TIPS means to insure proper service

all personal services require a tip
many get 15-18%, like restaurants, etc.

where someone personally handles you, tip 20% and more.
such as a massage, or a hairstyling, or a facial - start at $10 for basic, more for additional time or services (if you get $100. highlights & cut, $20+ tip, $2+ shampoo)
shampoo person - $2
brows, etc. - 5+

somewhere on the web you can find a list of acceptable TIPS for specific svcs. including taxi drivers, flower delivery person, lawn-mowing, etc.

peace,
nightbird