Whatever you want! So long as it's in good taste!  We suggest you don't bring clothes that are real busy.  Bring whatever makes you YOU!  Feel free to bring your musical instrument, your pet, your car!  Do you love shoes?  Bring them all! Do you love purses?  Bring 'em.  Is your cell phone your favorite accessory?  Of course it is, but I know you will already have that so I won't tell you to bring it. :)) Wear your senior ring if that's important to you.