Staying grounded is a very important aspect of healing work with crystals. I use grounding stones to achieve this during healing sessions. An easy way to ground yourself anytime is to put bare feet to earth or bare skin to a tree. This is a practice called Earthing and there is ample science behind the health benefits. You can check it out in more detail here:
Extra hydration is always needed when receiving any kind of healing work because as the energies are stimulated to move, so is the body's own processes. This initiates detoxing and cleansing of the body as well as the emotions./The extra intake of water will help to flush out toxins and help with the release of emotions.
Self-care as a daily practice is vital to any healing process, being mindful of what we feed our body, mind and spirit. Reiki and Crystal Healing are wonderful healing supports if used with a comprehensive holistic lifestyle approach to healing. It is empowering to take responsibility for your health, your body and the journey of healing that you will embark on.