It’s a common phenomenon that around this time of year many people begin to feel pretty down-in-the-dumps. Could it be the approaching holidays and the associated busy schedules and travel? Maybe the prospect of having to spend time with distant family members? Or an after-effect of having piled on some post-Thanksgiving “winter weight”/fatty insulation in preparation for the colder months? Or, perhaps, it has something to do with the shorter days during winter?