Having switch to Debian distribution from Red Hat Enterprise Linux or The Community ENTerprise Operating System (CentOS), I am having hard time tweaking the apt-get sources list for Debian. However, there is a great free service named Debian Sources List Generator website.
In the Debian Sources List Generator website, we have the ability to generate the sources list file by selecting the country, Debian release, Debian branches, Debian updates as well as 3rd parties repositories. Nevertheless, there is an Ubuntu Source List Generator which you may try if you are a fan of Ubuntu like me. Both of them are maintained by Miro “churchyard” Hrončok.