class TFPortfolio {
    public function __construct() {
        add_action( 'init', array( &$this, 'createCustomPostType' ) );
        add_action( 'wp_enqueue_scripts', array( &$this, 'insertScripts' ) );
        add_shortcode( 'tf-portfolio', array( &$this, 'portfolioShortcode' ) );
    }
    //...
}