Centering Nav CSS

Looking for some insight on how to get this navigation centered in the header. As I’ve been told it’s not the best to place it within a div.

I’m banging my head on a wall trying to do this, I swear every time I do a layout the navbar gives me the most trouble. (Ignore ghetto rigged logo)

Thanks in advanced,

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>

<style type="text/css">

* {
	padding: 0;
	margin: 0;

body {
	font-family:Euphemia, Times, serif;
	color: #353535;
	background-image: url(images/bg.jpg);

#header {
	width: 100%;
	height: 145px;
	background-color: #353535;

#logo {
	width: 485px;
	height: 56px;
	background-image: url(images/logo.png);

#logoHolder {
	margin-right: auto;
	margin-left: auto;
	width: 940px;
	height: 40px;
	padding-top: 40px;

#nav li {
	list-style-type: none;
	display: inline;
	padding-right: 20px;

a:link {
	color: #e4e4e4;
	text-decoration: none;
	font-size: 17pt;
	font-weight: bold;

a:hover {
	color: #ffc000;



<div id="header"> <!-- Begin Header Div -->
	<div id="logoHolder"><div id="logo"></div></div> <!-- End Logo Div and div Holder -->
    <ul id="nav">
    	<li><a href="#">home</a></li>
        <li><a href="#">about</a></li>
        <li><a href="#">blog</a></li>
        <li><a href="#">contact</a></li>
        <li><a href="#">hire me</a></li>
        <li><a href="#">portfolio</a></li>

</div> <!-- End HEADER Div --> 


Thanks Gary, worked perfectly


Do #nav {text-align: center;}