Whether it’s the common cold, man flu, the real flu, or a case of the seasonal heebie-jeebies, fall is wont to spring ailments upon us. The cold, dark months stretch out ahead, and we get feverish, tucked up in bed. The changing colors of the leaves can have a positive impact on your mood, which might be worth harnessing to counterbalance the onset of seasonal blues. We recently ran you through our ultimate 5-step guide to beating seasonal colds, for which we fielded some pretty unlikely candidates. But one dietitian has a tip that’ll blow your socks off. And it won’t cost you a penny. As Conf…