You read the wrong advice, and I can give you another wrong one: Try isolating your body instead of earthing it. This way the currents induced into it by your house's mains EMF will not flow out towards earth, thus interfering with the sodium ion equalisation process that is the essence of good sleep. Instead, they will turn into Foucault currents, energising you and making you feel more potent, without upsetting the synaptic potential. Google these concepts if you don't believe me

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Alternatively, take a sleeping pill, rise early, and drink less...