I want to do something in business or advertising/promoting products when I grow up. So what could I do for work experience related to my future career?

Everyones already got their work placements sorted & I just feel really stressed out! Please help, any ideas? I don't know much about advertising or business so any info would be useful. Thanks.
Sorry, I mean like copywriting or art director.

Work at a local newspaper. You can learn to use the software there and see how advertising comes into play. Learn how to build ads and how the pages are laid out for printing. It is a great place to get a start and usually easy to get a job doing something there!
Good Luck