Harvest Work - Grapes
I had a job trimming grapes which was really easy. It involved snipping the small grapes off of a bunch, then placing the bunch into a basket while chatting with others doing the same thing around a table. This type of job isn't the best if you want to make lots of money as you don't often work past 1pm for some reason, and you can't work if the grapes are wet. So while the pay was good at $12.50/hour, the hours were really crappy.

Most feedback I've heard from people who've picked grapes has been pretty positive. Wages seem to be either on an hourly basis, or based on the wieght of the grapes you pick. I don't know what the figure is, but you'll be paid a certain amount per kilo.