Adding a little accent to a room can be a difficult task, there are so many things to consider from colors and furniture to flooring and placement of decor. There are no rules that work with every situation, but there are a few basic rules that can help guide you through it.
Dark colors tend to make a room look smaller, however in larger rooms a dark accent wall can add depth. For smaller rooms, adding a bright accent color makes it look larger if done in moderation. Adding an accent wall and a complimenting color in the decor will help bring the room to life.
It is very easy to overwhelm a room with too much furniture, adding furniture a little at a time will also help you to see how much is just right for the room. Try to stay away from bookcases and larger storage items, they tend to collect junk and take too much away from your room. Open shelves and hidden storage works best.
I love the look of a light color hardwood floor, but that may not be in your budget. An area rug with tile laid around it (not under, so they are close in height) can be a way to get creative without breaking the bank.
Wall hangings are a great way to accent a room, but keep it to a minimum. The more you put on your walls, the more you take away from all the hard work you put into accenting the room.
Depending on the feel you are going for, the lighting can make all the difference. For a relaxing room or TV room, a soft light is recommended. For reading rooms, playrooms or any rooms where people gather, you should go with a brighter light. Bedrooms should have both options, bright light for getting dressed and a lamp providing a soft light for when you're getting ready to turn in after a long day.