Add an item to the Wordpress admin bar. Useful for quick links to settings!

add-admin-bar-item.php

<?php
function mytheme_admin_bar_render() {
  global $wp_admin_bar;
	$wp_admin_bar->add_menu( array(
		'parent' => false, // use 'false' for a root menu, or pass the ID of the parent menu
		'id' => 'cache_settings', // link ID, defaults to a sanitized title value
		'title' => __('Cache Settings'), // link title
		'href' => admin_url( 'options-general.php?page=wpsupercache'), // name of file
		'meta' => false // array of any of the following options: array( 'html' => '', 'class' => '', 'onclick' => '', target => '', title => '' );
	));
}
add_action( 'wp_before_admin_bar_render', 'mytheme_admin_bar_render' );
?>