Knowledgeable and able to express that knowledge. Massage therapists should feel comfortable and knowledgeable about talking to clients about the pain and tension they might be feeling and be able to choose a certain technique and communicate how that technique will help alleviate their clients' pain.

We spoke to two etiquette experts, who suggested leaving a 15% to 20% tip, if you're able. Twenty percent is generous for the massage therapist and easy on the brain, which may be feeling more relaxed than ever after a massage. The math is straightforward. To find 20%, start by finding 10%, then double that amount.

Board certification can be obtained from the National Certification Board for Therapeutic Massage and Bodywork (NCBTMB) and indicates that a massage therapist has attained a higher level of achievement beyond entry level licensure. Board certification is the highest voluntary credential available to massage therapists.