Talk!!! Tell people what you want to do. Living in Los Angeles, you meet someone who wants to be an actor at nearly every corner. I discovered that many people in the industry found it refreshing that I was not yet another wannabe starlet who longed to be in the spotlight, in front of the cameras and flashing lights. No, I wanted to be in the booth, where no one could see me. :) But, I did want to be heard.
So what if you're currently a receptionist or a barista? Don't be afraid to speak up and talk about your dreams. You never know who might be listening.