If your home is decorated in dark or unusual colors, you will scare off a lot of potential buyers.  It will be worth your while to paint your walls a neutral color, such as off-white.  If you're not up to painting your entire house, at least paint the areas that make the biggest impression, such as the entry/foyer, living room, dining room, kitchen and master bedroom.  Also, use the Mr. Clean Magic Eraser to clean off some of those dirty spots around door handles.  Sometimes just scrubbing away those little spots makes the room look fresh again!