If you have been using a spare bedroom as a dumping ground for odd pieces of furniture and boxes of junk, it's time to clean them up. Each room should have a clearly defined purpose, so think about what potential buyers might like to see here. An office? A guest room? Another kids' room? Whether you buy inexpensive furnishings, rent them, or borrow some from friends, making a real room out of a junk room will have a big payoff!