I found great Answer for the Interior Design question about space.
There are numerous diy ideas and you will definitely find decorating tip here according to your taste and budget.
So the Best Answer:
Use Light Colors, Glass and Mirrors
Some of the tricks I’ve learned are to use light colors, mirrors to reflect light and make spaces look larger, and good lighting.
Glass top coffee and end tables visually expand your floor space. Upholstered pieces with legs also visually expand floor area.
Light (natural or otherwise) makes a room feel larger. Keep curtains open. Add more lamps.