The absolute easiest way to ground yourself is to go outside and literally walk around in bare feet, feet on the actual earth as opposed to that fantastic flooring you just put in.
I find my best grounding work is done one step further. I ask my clients to head outside somewhere, in your own yard or at a park, somewhere with trees that is comfortable to walk with no shoes. I ask my clients to be bare foot and simply put their hand or some part of their body against a tree. What happens when you do this is that you become a conductor of tree energy to earth and earth energy to tree. The earth energy is travelling up through your feet, through your body, opening all the chakras as it goes and moves out through your arm and hand into the tree. The tree energy moves through your hand and arm, through your body, opening the chakras as it goes and ending through your feet back into the earth. If you can do this for a few minutes 2 or 3 times a day, you will notice a difference in yourself. You will want to go outside and do it. If you can do some good strong breathing, into the diaphragm whilst your there even better. If you can head to a park or place with a wide view and possibly sit in a cloth deck chair pushed up against a tree with your shoes off for a lengthy period, that is prime time earthing right there. It doesn't have to be grand, we don't have to hug trees and climb them.
Of course there are many more advanced methods of earthing and grounding oneself but we must be able to enter into earthing quickly as life is busy and this is one easy way to do it.
Here's a few links to grounding I have found along the way that resonate with me.