@KatetheGreat: I think it’s very smart for you to set up a safety net for yourself and to get yourself life experience. I don’t know much about hiring practices at restaurants but as an employee in retail, I have a few pointers for you.
Take your application into a store in person. It’s possible that hundreds of people applied for that position and the ones that are memorable are not the ones who applied online.
Unfortunately, lots of places will not hire you if you have any visible body modifications This is why I’ve stopped dyeing my hair interesting colors. :( so you should take out your lip ring when handing your application in and for any interviews you have. Ask them after the interview what their policy is on visible body modifications.
Along the same thread, some places have conflicting policies about visible body mods. For example, where I live, most restaurants will allow visible tattoos and facial piercings but no odd colored hair. Similarly, I have been to stores where people have odd colored hair but no visible tattoos.
Applying for a seasonal position is a great way to get your foot in the door at any place. Often, stores will look to their past seasonals over new applicants for permanent positions. If you really want something permanent, the best time to apply other than when a place asks for help is right after the summer ends. Usually, stores lose their high school and college help then and so will need new employees to pick up the slack.
Do not go in asking for a specific amount of money. There are dozens of other people who will do what you do for minimum wage.
If you do get an interview, dress for the job. This means don’t wear a suit if you’re getting a job at the mall but do wear a nice, clean shirt without logos or words and a pair of nice pants.
Apply according to your strengths. You sing at an opera house so that may give you an advantage when applying to places like record stores or places that sell instruments.
The best piece of advice as someone who loves being a retail grunt I can give you is this: Don’t go into this expecting to hate it just because other people do. Lots of people think of retail and waitressing as soul-sucking jobs that will turn you into a mindless drone. This is not true. Remember, the retail workers and waitresses of the world make life comfortable for those people with “important” jobs which makes us even more important than anyone thinks.