It's widely believed that the moon promotes healing. Thus, tonic waters containing said healing energies from the moon can be very relaxing and helpful.
Leave a jug of spring water out in the full light of the moon. During this time one may ask for their patron God/Goddess/Deity to bless it or ask the moon directly. Put a lid on it when the moon begins to go away. It's very wonderful for cleansing yourself with. It also is good for washing crystals in and infusing them with healing or cleansing them of energies.
On a night near or during a full moon place a clear quartz crystal in a class or jar of purified water. At dusk, place this container with the crystal somewhere directly in the moonlight. Before dawn, remove said container. You may use this for spells or purely for drinking.
Doing either of these may leave you feeling refreshed.