I wear my mask whenever in public and wash my hands at least 15 times a day. This includes whenever I am near anyone else including pumping gas or going through a toll (parking), or just walking on a street.
My son and husband just got over having COVID. While they had COVID they were quarantined to their respective rooms and were only allowed to use one of the bathrooms and had to stay on the second level. Whenever they came to the same floor as me, they and I would wear a mask. I would wipe down anything that they touched. When I would use the same bathroom as them, I would have my husband clean it with bleach right before I would use. I would deliver their food at their door and pick up dirty dishes from outside their respective door. For one week after they tested negative, I still made them wear a mask if they came on the same floor. If I were to use the same bathroom as them, I would wipe it down.
Luckily, I haven't contracted COVID since November 2020 (before the vaccines of which I have had 4 before my transplant).