Best for: An upset stomach.
How it works: According to Chinese medicine, acupressure can balance the flow of energy in the body, or chi, and nausea is a sign of disharmony of chi. According to a 1995 study published in the journal Aviation, Space, and Environmental Medicine, people who performed acupressure on their wrists reported reduced motion sickness. Use your thumb to press your inner arm three finger widths (about two inches) down from your wrist crease. Hold for a few minutes, until symptoms subside.
Good to know: For a hands-free option, try the Sea-Band motion-sickness wristband ($10, sea-band.com). A small bead attached to the wristband exerts continuous gentle pressure.