Can I ground myself, the building, or a type of makeshift / premanufactured shield?
As mentioned above, grounding a shield will only affect the electric component of an EMF field – not the magnetic portion. Grounding yourself will typically only protect against static electric shock – which is normally only a concern with anti-ESD (Electrostatic Discharge) procedures where wrist straps are used to protect delicate electronic and computer components while working on them. We cannot advise anyone outside of a licensed electrician to ground any part of a building, structure or electrical circuit as there is always the chance of shock, injury, death, fire or lightning damage from improper wiring or installation.