You can make all kinds of extracts. The idea here is that to extract the oils and flavors, you need a higher alcohol content than what your wine is. Cinnamon, especially, does not get intense enough to stand up in the bottle if you just put cinnamon sticks in the secondary. So you get a bottle of vodka, and put about 8-10 sticks in it. In about a month, you'll have an extract to backflavor your wine.
You can do the same thing with vanilla beans--about 8 vanilla beans to a fifth of vodka. Vanilla is really good on concord--and probably on many other red wines. For both of these extracts, use 1/2 oz. per gallon of finished wine.