It is great to see some really solid and useful advice coming out on this thread. Keep it up.
To the applicants this year, keep your chin up when all is dark around you. Budding Barista and Wildman are right on the money, in that you must really learn from each interview.
Top tip: take a notebook with you and, after each interview, write down what happened, the questions you were asked and how you could improve next time around. It'll help imprint the memory into your brain and, if you don't make it this season, it will be invaluable for the future.