A way to avoid name clashes for custom modules that are used for specific sites, is to use the site name to create the module name. For example, the short name used for "Drupal.org customizations," which is the project containing modules used specifically on drupal.org, is drupalorg, while a similar project containing custom modules for groups.drupal.org is groupsdrupalorg.

You could also avoid to use the top-level domain, if you think that you will not create modules for sites with a domain name that differ only for the top-level domain (e.g. bingo.com and bingo.it).

Best practice for avoiding module / theme / profile name clashes?
Is there any official guidance on where to put a transcript for a video? Should it go on the same page as the video or on a separate page?
