Help designing bedroom...?!? I'm a teenage girl and sadly own to share a room. I'm...

I'm a teenage girl and sadly own to share a room. I'm a bit of a tomboy, and I enjoy darker colors. My comforter is armada blue. I LOVE posters, (guitars, fall out boy, patd, etc.) and I don't have unbelievably much space to decorate. My sister is several years younger than me and is a soccer FREAK! I don't want anything soccer or matching. Can anyone find a website planner, or come up beside some ideas to help me?

Thank you SO much, I appreciate it! ^.^
Complete design newbie around to style my kitchen...
Answers:    Here are a few sites that might lend a hand you out a bit!
http://www.cfg.gov.uk/service/room%20pla...
http://furniture.about.com/od/buyingtips...
http://www.smartdraw.com/specials/room-p...
http://www.planningwiz.com/

well-mannered luck and have fun!