Hi Manu, like venkat sir has mentioned, there are several threads that contain the information that you are looking for. The entire "AV Enhancers & Room Acoustics" section has a wealth of information and gives you an idea of how to treat your room. I have seen what you have done in your HT Room and must appreciate your innovative-ness in the way you have used household foam and bolsters for your treatment.
I am pointing you to a few that helped me:
For Products:
http://www.hifivision.com/av-enhancers-room-acoustics/3473-how-sound-proof-hts-room.html
For some DIY:
http://www.hifivision.com/av-enhancers-room-acoustics/2979-please-suggest-false-ceiling-option.html
Nice post by Venkat Sir which explains DIY tips for locating the reflection points and DIY treatment:
http://www.hifivision.com/av-enhanc...-help-required-entertainment-room-set-up.html
There are several other threads on some international online forums. The more you read, the more you learn and sometimes more you get confused. I got stuck at one stage and Venkat Sir was kind enough to guide me. Do it in phases and treat the issues in a progressive manner an stop when you are satisfied. This way, the sound treatment will not be an over-kill.
All the best!!