The document discusses best practices for building Ruby gems, which are reusable packages of Ruby code. It outlines the key components of a gem, including the gemspec file, versioning, documentation, and common files like the README and LICENSE. It also covers distributing gems through services like RubyGems.org and hosting your own gems, as well as installing and using gems in Ruby applications.

1. Newer Yankee Workshop Build-a-Gem

2. What's a Gem? Reusable Pieces of Ruby Code

3. Packaged Following a Convention

4. Python Eggs, Perl CPAN Modules, PHP PEAR Packages

5. Why Build a Gem? So people can use your wonderful code

6. DRY

7. Version control across different project

8. Good Practices Don't require “rubygems” in your library - http://gist.github.com/54177

9. Always have test coverage