How do I change the content of my sidebar and body?

From your administration page select the "Design" tab, and then click "Layout". Then select the page you would like edit. The two boxes on the top show the order in which the selected items will appear. To change which items will appear or their order, simply drag and drop them where you want them. To drag and drop an item, click the mouse down on the box you would like to move and do not let up. Move the selected box to where you want it, and then release the mouse.