One of our writers was sick this week, making this all the more timely. ’Tis the season for it, after all. The mercury dropeth. Ditto the leaves. Here are the best tips for beating – or, ideally, avoiding – seasonal flu, as gleaned from a panel of experts. Spoiler: we’re not going to reel off such platitudes as, “Eat a well-balanced diet,” or “Take supplements.” There are things we all know that don’t need repeating. You might have come across these droplets of wisdom before, but I suspect one or two of them will strike you as novel. Read on for the ultimate 5-step (though not necessarily in t…