Bow-ties are easy to misplace. Replacement bow-ties are available for $5. Keep up with your bow-tie by hanging it on the hanger with your shirt and vest!
I recommend keeping your chorus uniform in a particular place where you will always know where it is: the very end of your closet, on the back of your closet or bedroom door, etc.
Your uniform should be completed with your own full-length black dress slacks and solid black dress shoes. Socks, tights, and belts should also be black. Undershirts, camisoles, etc. should be white or skin-tone so they don't show through the white tuxedo shirt.
For more information, see Attire.