So You Didn’t Get the Job
This can suck. But it isn't the end of the world. Take a lesson from me: I was turned down twice by Microsoft. That means I had to fly out from New York to Washington state three times, go through 16+ interviews and get burned four times in a row (interviewed with two teams each time) before I got an offer.
Even worse, I once applied for a Ben and Jerry's job while I was at school. All I would have had to do was scoop ice cream. I went into their office and asked for the manager by name. His name was "Rene" but I pronounced it "Renae". Oops. In the end I was good enough to graduate in Software Engineering with highest honors but not good enough to build Vermonsters.
Tip: If you don't know how to pronounce someone's first name, ask for them by their last name. If you can't pronounce either, just say "I'm here to apply for the job of 'Ice cream scooper'"
Getting Past No
If you are turned down for your dream job, don't hesitate to apply again. There may be a waiting period before you can get another interview, but there's nothing that stops you from going again. It can even help to get another job that you work at for a year or so and then apply again to the better job. Work experience goes a long way, don't underestimate the power of "1 year industry experience".
Finally, don't let it get you down. Everyone is turned down for something; it will happen at work, it will happen at school, it will happen while you're trying to get a job.
You are still the greatest, they just haven't noticed it yet.