Many people find it intimidating to paint the home. The walls are so bare - and the project is so large. Where do you begin? One piece of advice that many interior designers will offer is not to do anything for a year. If the walls must be painted, then paint them white or cream. Then, put all of your furniture, art work and other items where you want them to go and simply live in the space for a year. This will give you the time to digest exactly what you want in your home, and which colors you think will look best in the rooms.
If this plan isn't realistic for you, then consider a number of factors. You'll want to think about the light sources in the room when you select paint colors. How much sun will the room get? Which furniture and art work are you going to place in the room, and what colors will match best on the walls with these choices? Remember that dark colors make rooms look smaller, so take this into consideration as well. If you have a room or bathroom that is already quite small - you'll make it look even smaller if you paint it a dark color.
If you truly can't decide on paint colors, you may want to call in an interior designer. Perhaps you only want to consult with them for a few rooms, and you'll take care of the other spaces. This will save you time and money, while helping you to achieve exactly the look you want in those public spaces.