Looks like a resurrected old thread, but still relevant. When we were small, simple saline gurgles using warm water went a long way to preventing it going worse. Done abt 3 days before bed and on waking up. I thought it made sense.
I have several go-to remedies when I get a sore throat. My personal favorite is Chamomile Tea or warm Ginger Tea for the people in my life who don't like the Chamomile. There are tons of other remedies that people talk about that I have never tried.