There are many supposed types of EMF exposure. The type you cut down on seems to be "dirty electricity." Some electricians seem to test for this when wiring a house. Also, there are supposedly little plugs (forgot what they're called, but easy to google) that eliminate dirty electricity in your house. I would prefer not to use such a technology, and merely install an electrical system that doesn't suffer from this phenomena.
I bought Tri-field EMF meter and tested my walls and wiring for that. My house wiring seems to be fine. Basically, as long as the hot and neutral wires are twisted together into one "rope", it won't generate a magnetic field, but if you physically separate those wires, it will create a magnetic field, which I have also tested on 12 volt DC wires.
But that's just one potential source, and I don't think it is what did the trick for me.
I just use / recommend the circuit breaker method because most people probably don't realize all the different sources of magnetic fields and radiation in their home.
I have verified with my TriField, just like in that video I posted, that things like laptops and refrigerators and WiFi routers and AC-to-DC power supplies all generate magnetic fields.
But even the circuit breaker method is not fool-proof because you could still have a battery powered device like a phone or tablet next to you, or you could have a smart meter on your outside wall near you, or you could be getting radiation from an apartment neighbor, or a nearby cell tower, etc.