There is no definitive answer to this question as everyone’s needs are different. However, some general tips can be given. If you live in an area with high humidity, it is best to avoid earthing near water sources. Dry, sandy areas are ideal. If you have access to a beach, earthing there can be fantastic. If you live in a city, earthing on concrete is a good option. Basically, you want to find a spot that is dry, clean and free of chemicals.