So, this is, my space. Let's not use the word "manic"....
I hung the postcards with fabric covered wooden pegs (bamboo - sustainable wood) and strung them with thin strips of vintage kimono fabric.
I still dearly miss the studio I had in Australia, with two walls of window with lovely soft natural lighting, but this space is still very special to me. I used to share it with my husband, until one day the dear man decided that he'd let me have it to myself. Now it's my own space to mess up (a lot of the time) and to keep tidy (sometimes) when I want.
I also bought this cool room divider. It has adjustable poles that push into the floor and the ceiling to stay put. While I didn't need to divide the room as such, the mesh frame gives me so much extra hanging space. There are a bunch of hanging baskets on the other side too.