Do not get your jewellery wet. Certain crystals do not react well with water. Repeated exposure to water can result in cracking.
Do not exerise or play sports in your jewellery. Avoid spraying perfume directly onto jewellery.
Keep jewellery in box when not wearing.
If you feel your jewellery has dulled/lost potency then take note of the moon phase. 3 days before a full moon leave the jewellery submerged in salt over night and then take it out to charge under the full moon. (Please note you can also charge crystals under the new moon, waxing or waning as you see fit for your needs.)