How to display the correct values in the frontend

Took me a bit to get this out, since there is no help online.

I wrote a little function and pasted it into my functions.php:

function extra_user_info() {
		global $current_user;
			get_currentuserinfo();

		echo 'Your extra user info is' . $current_user->PUT_YOU_ID_HERE ;      		

	}

add_action ('NAME_OF_HOOK_WHERE_YOU_WANT_IT', 'extra_user_info', 20);