Probably a bit late, but this is what I do for my family:
-We take alkaline baths every month. If someone has the sniffles, or trying to come down with something, they take an alkaline bath. Basically sprinkle some baking soda in warm water and soak in it, almost like a sponge bath.
-Tinctures are your friend. Everyone (except the baby) gets a tincture once a week.
-Real Elderberry Syrup... can also take this if you feel something coming. Everyone in my family takes it.
-Rest!
-Make sure you are drinking water.
-Get plenty of sunlight.
-Orange Juice/chicken noodle soup/lemon, ginger, honey, turmeric tea/spoonful of honey can help soothe your throat if you don't have throat lozenges.
-Heavy hitter: Get a mason jar, fill it with 1 part chopped garlic and 2 parts Apple Cider Vinegar. Seal it with a paper towel/rubber band (it needs to breathe) and let it sit for 4 weeks. After 4 weeks you can take a spoonful whenever you think you're coming down with something. Eat a piece of the garlic if you think you need extra help.
-Vick's vapor rub on feet, chest, back and neck with some cold medicine if you get sick and want to help knock it out really quickly.
-Another thing I do that may seem trivial is staying on top of housekeeping, including: dust, vacuum and wipe down furniture, doorknobs, light switches every week.
-Once you get better, clean any water bottles that you normally use, clean the bedding, replace your toothbrush.
I probably left something out, but that's what we currently do. We rarely get sick. If anything affects us, it's mostly due to the A/C being too cold, or the weather is being bipolar. Hope you all are feeling better!