Question on interiors - hope no one minds if I place here

[SydneyIsHome]

Hi, I realise this is for posting photos and as all the photos here are so fantastic I thought perhaps some of you would not mind sharing me some general post processing techniques (PS or PS ELements) to get that smooth professional look. I am trying to achieve a look comparable to the attached which I have copied and pasted from a web ad, and would sincerely appreciate any instructions/recipes you might share. Again, sorry that this may not be in the right section but you guys are the pros and hope you can share with me. With best wishes, Avi