First, you have a body tag in your html 2 times, so remove the first one. Next, right after the line, insert a div with a sidebar id, so: .
Also, you have forgotten one closing tag, so add that just before the closing tag.
Next, the css. Your #page-wrap width is just a bit too small to fit the sidebar and the content area. You can change it from 800 to 900px or whatever you want really of course. The #sidebar div, float it to the left instead of to the right, give it a height (or it won’t show without content) and maybe add a background-color: #A06B65; or whatever color/image you like of course. That’s pretty much it, you might wanna think of indenting your code somewhat better for easier reading.