Alert Email when any Post or Page is Changed

There’s a few plugins that handle email notifications, but they all seem to act like a subscription service for (all) WordPress users.

To notify just you when a post or page is published:

/**
 * Send an email notification to the administrator when a post is published.
 * 
 * @param   string  $new_status
 * @param   string  $old_status
 * @param   object  $post
 */
function wpse_19040_notify_admin_on_publish( $new_status, $old_status, $post ) {
    if ( $new_status !== 'publish' || $old_status === 'publish' )
        return;
    if ( ! $post_type = get_post_type_object( $post->post_type ) )
        return;

    // Recipient, in this case the administrator email
    $emailto = get_option( 'admin_email' );

    // Email subject, "New {post_type_label}"
    $subject="New " . $post_type->labels->singular_name;

    // Email body
    $message="View it: " . get_permalink( $post->ID ) . "\nEdit it: " . get_edit_post_link( $post->ID );

    wp_mail( $emailto, $subject, $message );
}

add_action( 'transition_post_status', 'wpse_19040_notify_admin_on_publish', 10, 3 );

You can either drop this in your theme’s functions.php, or save it as a plugin (which might be more appropriate, as it’s not exactly ‘theme’ related).