1. Fork the repository on GitHub.
2. Create a named feature branch ($ git checkout -b my-new-feature).
3. Write tests for your change (if applicable).
4. Write your change.
5. Add documentation to your change.
6. Run the tests, ensuring they all pass ($ bundle exec rake). Try as much as possible not to reduce coverage.
7. Commit your change ($ git commit -am 'Add some feature').
8. Push to the branch ($ git push origin my-new-feature).
9. Submit a Pull Request using GitHub.

You can see the TODO.md file if you're looking for inspiration.