A great article on Napa Valley Register by Michael Silacci on pruning going on in the vineyard right now.
On a crisp January morning, under clear blue skies, Alfredo Llamas walks up to a vine in a Napa Valley vineyard. He kicks the grape stake to see if it was broken, gives the vine a once over, and begins to prune it.
Once Alfredo has given the stake a gentle kick, the vine has his complete attention and focus. He evaluates the length and girth of the canes, judging the number of buds to leave at the position.