Kill attachment, search, author, daily archive pages etc.

/* Kill attachment, search, author, daily archive pages */
add_action('template_redirect', 'bwp_template_redirect');
function bwp_template_redirect()
{
    global $wp_query, $post;

    if ( is_attachment() || is_month() || is_year() || is_day())
    {
        $wp_query->set_404();
    }

    if (is_feed())
    {

        $attachment = get_query_var('attachment');
        $attachment = (empty($attachment)) ? get_query_var('attachment_id') : $attachment;
        $day        = get_query_var('day');


        if (!empty($attachment) || !empty($day) )
        {
            $wp_query->set_404();
            $wp_query->is_feed = false;
        }
    }
}