I am reading an interesting book called Vineyard at the End of the World by Ian Mount. Although it's a bit too detailed in the minutia of history, I am learning a lot about how not to make wine.
What I am learning most of all are some of the mistakes and tricks that lead to a successful vintage. Like you need to have a dry spell at the end of the ripening period just before harvest to concentrate the flavours in the grapes. Dilution with water, which is what was happening in Argentina as the grapes were sold to vintners by weight so they watered them to increase yield, causes bad things to happen chemically. It is also important to reduce the yield by limiting the number of shoots and clusters so that all the effort goes into the remaining grapes. That's going to be a hard lesson to learn.