Keep a healthy supply of toilet paper. We're not kidding. If you're lucky enough to have an in-suite bathroom, you may have to supply your own toilet paper. It might not have occurred to you while living at home, but paper products—like TP, tissues, and paper towels—do not grow on trees (despite the fact that they begin as trees). We recommend starting a standing Amazon or Soap.com order to save money. Also, don't skimp on ply. Spend the extra 50 cents. It's always worth it.