Traditional Chinese Medicine also associates the season with the lung/large intestine organ pair; with the lungs being the Yin organ of the pair and the skin being considered the third lung. If you notice a rash or a cold coming on it's possible that your lung Chi is out of balance. A Yin routine that incorporates some back-bending poses (Sphinx/Seal, Camel, Fish) is a good way to stimulate your lung Chi.
With temperatures varying from day to day, even hour to hour some days, it's a good idea to carry a sweater to protect us from the instability of the season. It's also a good idea to watch how much dairy we consume as dairy is known to cause excess phlegm in the lungs. In addition, we can use a Netti pot to clear out our nose; the opening to the lungs. It's important to take care of ourselves during this time of transition so our bodies are prepared for the winter season.