A new layer of paint can sometimes make a world of a difference. Fixing the chipped and cracked paint on your porch can stop buyers from thinking about what needs work and instead leave them with the impression that your home has a beautiful outdoor space.
Painting the walls a neutral colour can also make rooms appear bigger and allow the buyer to envision how they could make the space their own. Although your daughter probably loved the bright purple walls in your furnished basement that you used as her playroom, the buyer may not. Instead, they may want to use this space as an office or media room. A light cream colour will allow them to see the room as more functional.
However, don't completely rule out colour. A deep blue in the dining room can make the room look more elegant and impressive. Use colour when you want to highlight a room and really bring out a space's strengths.