My class this past year was slightly rowdy...clip charts, prizes, etc. just didn't really work for them because there was still lots of arguing about what color people were on or who earned this or that. Really the only thing that did work was trying to keep them so engaged and motivated that they didn't have time or weren't interested in all the nit picky things.
They were a handful, but one of the things that did that for my class was music! If I was every at my computer typing in www.youtube.com, they would go nuts. Fortunately, our school allows the use of You Tube on teacher accounts. Here are some of my favorite music videos to use: