Elizabeth makes a very good point.... if you are married or have a significant other living in the dwelling it would be wise to consult with them prior to going to town on the room.
My listening space is our "Great Room". It's a horrible room (audio wise) to begin with so it definitely needed some treatment help.
I had my wife involved along the way since we both have to enjoy the space. I ended up using 1/2" copper pipe as a drapery rod for the walls that have windows. This rod also doubles as a rail to hang my treatments on. The benefits of using this method is that you can move the treatment piece left or right for fine adjustments but...... you can also just lift the treatment off of the wall in case of a party or gathering.
I can say that this not only has made a huge difference in my sound of the room but it offers huge flexibility for changes and adjustments. Most importantly my wife is happy with how it looks........