does this /etc/apt/sources.list look okay?

[Default User <xyzzyx@sbcglobal.net>]

Hello. 
This is my /etc/apt/sources.list file: 



    #deb file:///cdrom/ sarge main

    deb ftp://ftp.debian.org/debian/ stable main
    deb-src ftp://ftp.debian.org/debian/ stable main

    deb http://security.debian.org/ stable/updates main



That was created by Debian Stable after a fresh install.  It seems
rather sparse. After past installs of earlier versions the file had more
entries, iirc.  

Also, I don't seem to be getting any updates after running:

sudo apt-get check
sudo apt-get clean
sudo apt get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

Am I missing some important or at least useful entries?  

Thanks for any input.