remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);
remove_action('wp_head', 'feed_links_extra', 3);

add_filter('wp_mail_from', 'new_mail_from');
add_filter('wp_mail_from_name', 'new_mail_from_name');
function new_mail_from($old) {
    return 'your-email@yourdomain.com';
}
function new_mail_from_name($old) {
    return 'Your Site Name';
}

define( 'WP_POST_REVISIONS', 5 );

define( 'AUTOSAVE_INTERVAL', 300 ); // seconds