URGENT HELP FOR POSTER IDEAS??? i will reward best answerrr*?

This year, my school relized my artistic ability, and instead of asking one of the creative seniors or an art teacher to desighn posters for school events, they alwayss ask me now.i think becuase i can make a poster just as good, but they dont have to pay me! (i sooo wish they would though!). but sometimes i have trouble thinking of how to desighn the posters so that they will like it!, it has to look amazing, not that they havent liked my previous posters, but im having an artist block! the librarian at my achool rlly wants me to make our book fair poster, since its in like 2 or 3 weeks. The theme is "diner" as in restraunts, and food, but it has to involve books, she gave me a book with pretty good ideas in it, like people eating "book sandwhiches" and stuff, and slogans like "all u can read" but i dont wanna copy out of some book, ya know!? so do u have any ideas, it has to be a big poster and needs to look really good, pleaseee give me some clever, great, awesome, best ideas u can think of! even if u think there cheezy or stupid! i need some ideas. she wants it by tuesday, ( we have monday off). the thing is i dont have much time to make all these posters, it stresses me out to balance all my school work and other stuff and make these posters! last time i made a poster i was up all night becuase they have to be on a huge like tri-fold board! lol anyways im also trying to get into an art school called charleston county school of the arts, and am working on other art for my portfolio! so needless to say ive been real busy making that art...im stressen, so please give me sommeeee ideaas!???? THANKU! :D