Have your character developed before you audition--do your audition piece as your character would do it, even if it isn't a piece from the show--Stand as Fantine would stand when you sing your song--wear an item of clothing that helps you to look and feel like the character(don't go in costume--but think, if Fantine lived here, today, what would she be wearing?) before you start your song, pause for a second to get in touch with Fantine--