I'm not going out much, but when I do I wear an N95 mask, which I reuse. (I only have a few. I spray it with Lysol and let it air-out a few days before I reuse it) I use hand sanitizer before I get back in the car. At home, I wash my hands a lot and my face occasionally, especially when I first get home. Shirt comes off and goes in the washing machine when I walk in. When I have to interact with a deliveryman or something, I keep track of which hand (left) touches anything possibly contaminated, and I open the door with my other hand so not to contaminate the knob.
All groceries, the mail, etc gets dunked in bleach or sprayed with Lysol as soon as they come in the house, and plastic bags are thrown away. Paper bags are saved to reuse after several days outside in the sun.
And I think that's enough; I'm not worried about it. My brother, OTOH is scared to death he's going to make one little mistake somewhere and kill us all. And of course that's possible, but if it happens it was meant to be. You can't live in condition orange all the time, and even if you do you can still make a mistake and not know it.