body {
/* assigning a width and height to your body can also help with positioning */
}

#navigation {
/* whatever you already have in here for now */
width: Xpx; height Xpx; /* assign a width and height if you haven't yet */
}


#content {
margin: 10px 0 0 20px; /* top right bottom left */
width: Xpx; height: Xpx; /* assigning a w & h helps with positioning
}