How can I make a room feel bigger than it is?
Ways to make a room feel big (not a complete list):


Cover one wall with mirrors - this may be extreme but it is effective. Even framed mirrors make a room feel larger.
Increase the amount of light in the room
Paint your walls a light color
Reduce the amount of furniture/stuff in the room
On wood or tile floors use an area rug that is smaller than normal
Pull the furniture away from the wall
Leave your windows uncovered


Hopefully one or more of these suggestions will help.