There’s nothing like stressing out over tipping to ruin the end of a great haircut, pedicure, or other treatment. Knowing the basics makes everything better for you—and your aesthetician. Here’s what you need to know:
Twenty percent is a good rule of thumb for the person who performed the service. Throw in a little extra for more labor-intensive or truly spectacular treatments.
The owner of a salon should never be tipped.
Assistants should be: the right-hand people get $10 to $20. Pricey services have their own rules. Cindy Barshop , whose Completely Bare spas specialize in laser hair removal at $150 to $1000 a session, advises clients to give $25 to $40.
Always try to tip in cash. Otherwise, the technician has to wait until the end of the payroll cycle to get the money.
Finally, if you’re paying with a gift certificate, the tip may not be included. If you’re not sure, ask the receptionist to check.

(Source: shine/yahoo.com)