Make your visit stress-free by knowing these spa etiquette tips before you go: Always be punctual; be aware of the spa’s cancellation policies; turn off the smart phone; and leave the valuables at home. Prefer a male or female therapist? Request in advance, allowing spas plenty of time to meet your wish. When it comes to tipping, 15%-20% is customary (check with the spa; many permit cash tips only). Learn more spa etiquette tips.