Water
One bit of advice that you'll hear over and over again is to drink plenty of water after a massage. Bodywork - no matter the particular modality - releases toxins, such as lactic acid that need to be flushed from the body. Massage also promotes circulation, increasing blood flow and oxygen and stimulating the lymphatic system, which helps rid the body of pathogens. After-massage hydration supports these function, helping to eliminate released impurities, sooner than later.