Move Out the Mess - When you are decorating a small room or several rooms, one of the easiest things to do is keep out clutter! Clutter will make even the largest of rooms feel small and cramped. How much more will it do that to a tiny room?
Lighten Up the Color Scheme - When decorating small spaces, using muted pastels or neutrals will give the feeling of a larger space. Dark colors can make something cozy and inviting, in a small space light colors are the better choice.
Brighten Up Your Lighting - In a small space, using muted lighting can give that cozy feel without using the dark colors. If you can, have lighting mounted on the walls or canned lights in the ceiling with dimmer switches. Then you can have a brighter space when you need it to feel larger for entertaining or more subtle so you can have it cozy for an evening at home. Plus, floor lamps or even table lamps take up space. If you need a table lamp for reading or other task lighting, go with a smaller lamp and leave the floor lamps for larger rooms.
Think Tall and Slim - When it comes to furniture, think tall and slim, not short and wide. It will physically make more room in your space as well as give the impression the space is larger with pieces being taller. Also, don't overdue the furniture. When decorating a tiny space, less is more!
I hope these tips give you some ideas on how to make your tiny rooms feel big!