Start with storage: how much of your clothing is folded and how much is hanging? You will need a chest of drawers, at least. Under the bed is a good place for storing out of season clothing or anything else, such as shoes.

You can also use hooks on the back of the door for hanging coats or a robe. you may also go vertical with shelves for books or folded clothes. Here's a clever idea for a desk in a corner:

Bean bags (if they aren't too big), poufs or folding chairs will all work for extra seating.

Poufs are expensive, so you may want to invest in a rug first. If you invest in a rug, you can use the colors in the rug for decoration for your walls and bed linens.

Good luck.

That's about 9x14 I think..

Is there room in your budget for a new, bigger, bed? What stores are you near? Hopefully Ikea as it's great for space saving ideas and inexpensive, but small scale furniture...