Grounding helps you to:

1. Be more fully present.
2. Feel stable and centered.
3. Release heavy energy. (Yes, the Earth can recycle jangly, nervous or heavy energy of negative emotions! But, don’t worry, the Earth is not harmed in the process.)
4. Improve your vitality.
5. Bring your imagination down to earth, give it form, and manifest your dreams!

We access Earth energy through chakras in the soles of the feet and the root chakra at the base of the spine. Here’s how you can ground your energy:

From:  http://cynthiarevesz.com

Sit on the edge of a chair with both feet flat on the floor. Your feet should be at 90-degree angles below the knees and your spine straight.

Close your eyes and visualize energetic cords, like the roots of a tree, descending from the base of your spine, and from the soles of your feet, deep into the Earth, through the soil and the rocks, traveling way down into the molten core.

Allow Earth energy to flow up through the feet, legs, and the base of the spine, allowing it to collect in the energy center, or dantian (which means elixir field in Chinese), located approximately 2-3 inches below the navel.  Feel how, like tree roots, these energetic cords anchor you to Mother Earth.

Then, take a few deep breaths drawing up more Earth energy as you inhale. As you exhale, release any stale, heavy energy, or excessive emotion, down into the Earth.

Feel how you are stable, solid, centered, balanced, present, safe and secure. Use this practice for grounding your energy to help you maintain, or re-establish balance.

from:    http://www.newrealities.com/index.php/articles-on-human-health/item/2865-5-reasons-to-ground-your-energy-by-cynthia-revesz