Charging water means giving a "life-pattern' or structure to the water at a microscopic level The hydrogen molecules in water are closer together if the water is charged. This makes the water more polar (strongly electrical).
Adding a few pinches of Celtic Grey Mineral Sea Salt or Himalayan Pink Salt is a great way to charge water. These are some of the best choices for non-vegetable sources of salt. These salts each contain over eighty different minerals in similar ratios as they appear in sea water. They are "raw" salts, thus they differ from coagulated table salt and most "kiln-dried" sea salts that have had their minerals oxidized away through heating.
Other ways to charge water include adding MSM powder crystals. At my office, we have distilled water delivered in glass. We have placed several quartz crystals in the distilled water dispenser, which charges the water, as has been proven with Kirlian photography.
Squeezing fruit juices or placing leaves of plants into water adds a charge. Squeezing lemons and/or limes into your water is an excellent choice because they have incredible cleansing and mucus-dissolving properties.
Putting water under full moonlight charges the water as well. Running water through a vortex (the tornado effect) improves its quality. Dr. Emoto has shown in his books The Message from Water (volumes 1-3), that water responds to loving thoughts and even words written on a water bottle.