FERN !!! 

It states the obvious like it's an herbal remedy.  Make sure you're getting enough

• Fluids  (Give your water bottle a reason to live!)
• Exercise  (How about a walk?)
• Rest (After all that exercise, you'll need it.)
• Nutrition (The good kind.  Not in pill form.)

Stock up

Buy supplies now, before you need them.  (For that matter, put this note in your calendar for July or August next year!)

• Basic cold medicines:  If you have one or two you tend to need regularly, make sure they're at hand.  Ask your doctor if you should keep antibiotics in the house for immediate dosing.
  
• Cough drops:  Put them in a Zip-Loc and keep them somewhere cool and dry.
• Tissues: What, you think they're gonna go bad?)
• Hand sanitizer.  Because it's you, it's me, it's up to all of us.
• Humidifier: Because stores will run out.
• Vitamins & herbal supplements:  Everyone has their own theories about supplements.  But whether you use them daily or just when you're fighting something, make sure you're ready to go to battle.
• Zinc lozenges:  Don't buy too many, as they tend to absorb moisture and go bad.  But make sure you have some on hand, so you can use them the moment you feel something coming on.
• Tea:  Throat Coat from Traditional Medicinals seems to be a singer favorite.  Yogi Tea makes a good throat soother, too.  I like mint tea, green tea or tangerine, with just a touch of spiced honey.
• Chicken soup: Canned or a mix -- make it easy for when you need it most.  If you're up to it or you have a live-in chef, here's a killer recipe for pimped-out ramen, full of 6-minute goodness.