A few general bits of advice for you.
Have you asked anyone if there was anything specific that they saw/heard that prompted them to not hire you? Do you have any gaps in your employment record that you didn't explain? What about recent employment? If you're not currently employed, I'd highly recommend volunteering somewhere while you're looking for a "real" job. This shows that you're not just a slacker that's out of touch with the work world; it can also build up your networking circle and may just get your foot in the door somewhere.
Take a look at the clothes you wore to the interview. I've seen some horrendous outfits that make the applicant look like they just stepped out of a strip club. A pair of nice slacks, a button down shirt, and a pair of nice shoes (no platform/stiletto heels) will work for any interview at Disney (and 99% of the entry level positions pretty much anywhere). Make sure your makeup is natural looking, and you're not doing anything funky with your hair or jewelry. Less is always more in those areas.
Make sure you're checking any negative attitudes/thoughts at the door when you arrive. These interviewers are trained in reading body language; if you come in with the proverbial chip on your shoulder, they *WILL* see it. No, body language isn't always correct, but it speaks volumes about someone more often than not, so you need to be aware of it. Speaking of arriving, make sure you get there about 10-15 minutes before your interview time, but no more than that. Getting there a few minutes early shows that you respect the interviewer's time, but getting there too early can make some interviewers feel rushed because they don't want to leave you waiting in the lobby too long.
Ask when you should expect to hear something back, and also ask them if there's a way you can contact them if you have any additional questions. If they tell you "you'll hear back in 7-10 days", don't start calling (or e-mailing if they gave you an e-mail address) at the 7th day to ask why you haven't heard anything. If the 10 days passes and you haven't heard anything, call (or e-mail) the next day and ask if a decision has been made yet. And if you are given an e-mail address, don't forget to send a thank you e-mail when you get home that evening. Most people don't do that, so you'll stand out in the interviewer's mind when they're reviewing resumes.
Try not to use "hiccup" words, like "uhh", "ummm", or "like". If a question is asked and you don't have an immediate answer, ask them if you can think about it for a few moments or ask them a clarifying question. Grammar and enunciation are biggies, no matter how eloquent your answer is, if you're using words like "gonna", "wanna", etc., that will overshadow anything you possibly say.
Do you have direct experience in the job you're applying for? If so, highlight that on your resume. If not, change up the wording on your resume so the interviewer can see how you'd use the skills you've gained at other jobs in the job they're trying to fill. Also, keep your job options open. If you go in wanting to work *ONLY* at ride/store/restaurant XYZ, you're most likely not going to get the job, because they hire only a certain number of people for that. If you're willing to work at *ANY* ride/store/restaurant, you're more likely to get a job, and once you're in, you have an inside line to transfers once they become available.
Working at Disney is not a prerequisite for getting into the entertainment industry. Yes, you can sometimes make connections with people that may keep you in mind when they hear of a job opening, but I wouldn't count on it. Depending on what exactly you're wanting to do in the "entertainment industry", Disney may not even be a good option for you. You need to go into a job interview thinking about what *YOU* can do for the company, not what you're going to use the company to do for you.
If Disney is really really really where you want to work, keep applying. But don't give up on everything else just because you might work at Disney one day. Have you tried applying at Universal? When I moved down to Orlando, I applied at Disney because it seemed like the thing to do, but I decided to stop at Universal on the way home and find out about setting up an interview time, and was able to get interviewed that day and offered a job immediately, where Disney said it would be 2-3 weeks before I heard anything. Guess where I spent the next 5 years, running rides, being part of the opening crew for Islands of Adventure, learning how to walk on stilts, and helping with movie/TV show/music video production.