Personal Non-Standard Precautions Against Covid-19?

what I've done:

A decade ago I stockpiled food, high-quality surgical masks, antibiotics, pre-antibiotics BHT and some strong herbal remedies, vitamins and minerals. I knew that in a pandemic only doctors would get the good stuff and there would be supply line shortages.

Last week I began with weak cinchona tea, 25 mg zinc tablet twice daily and two zinc lozenges morning and night to coat the passages of my nose, throat, sinuses et al. All as a prophylactic measure. [Plz no alarmist warnings about cinchonism].

Yesterday morning I woke with the bad feeling of flu. No cough, no fever, no lung soreness. I took BHT 250 mg for the first time and went out gardening anyway. The feeling passed in an hour, leaving me a little tired, so I took a nap.

Today I woke to a sharp needle-like pain (like _one_ needle, literally) in my left chest that immediately went away. I thought "So that's what it's like!" Got up, took another BHT and continued the day. Still no cough, no fever, no lung soreness.

Of course if this gets serious I'll be in the doctor's office as fast as anyone but... I also know there are all kinds of people trying all kinds of "solutions", so....

what is your Personal Non-Standard Precaution against Covid-19?