Write an article based on this "Before you do anything, go through all of your stuff. Bring all of your furniture out and bring it into a separate room so it is out of the way."
Sort everything into four piles: keep, trash, give away and to decorate with. Keep everything you want to keep, trash junk, recycle papers, give stuff away to family/friends, and donate the other stuff to Goodwill or the Salvation Army. This is a pretty essential step because it will help declutter your room as well as get rid of clothes that you don't want. Empty your room of any unwanted toys, games, etc. so you don't have to re-clean your room after. This could include your bed, dresser, desk, drawers...