Take a look at magazines like Home Deco, Ikea catalogues and such. Interesting composition, complementing colours and proper lighting are important. I think Saturday's Life has articles on home design, take examples from the photos there as well.
You can shoot your own house or relatives/friends as it may be difficult to emulate the style in magazines. Simple composition is the best (as always), apply the usual "rules". Start small: a table, some chairs and an object on the table as the centrepiece (eg: vase, etc), remove anything that does not add to the image, clean the place up! Nothing more annoying than having to PS dust or letting the viewer see dust. Use colours to create a mood. Would be wise to decide the mood beforehand so you can build up. Use colours that mix well.
Lighting wise, create depth in the image but don't leave deep shadows either in the foreground or background. Decide your lighting: daylight/flash/mixed/continuous, play with bounce lighting, shooting time- any light coming in?, etc.
Always make the impression that the room is larger than it really is, if the room is small shoot with WA and brighten the room. Feel free to be creative but make sure you don't blur the line between reality and fantasy, sometimes you lose sight in PS because you want to impart a bit more 'creativity' so just present the room as it is.