To that list, I always keep Oscillococcinum (get on Amazon from Boiron), Zithromax, Yin Chiao Herbal Tablets, and some Ban Xia Hou Po Pian. Both the Chinese herbals are available on Amazon.
I also stash some Oscillococcinum and Airbornes for when I feel the sniffles coming on.
Rock and Rye, too.