I've already been thinking about it

For the house (in case someone is sick): Face masks, bleach, disinfectant wipes, hand soap. Zofran, Imodium, Benadryl, Vitamin D.

Outside the house: No eating in restaurants or food prepared by other people. This is how ~80% of noro is spread if I remember correctly. Wash hands religiously; avoid touching mouth/nose/eyes with dirty hands. Avoid recently-sick people (when possible).

After my bout with "super-noro" last winter, I'm not chancing it again.