WordPress.org

Fast and easy.

1. Extract the downloaded file and copy the 'wow-breaking-news' directory to your plugin directory, like this: /wp-content/plugins/wow-breaking-news/.
2. All files should remain under the 'wow-breaking-news' directory, ie: /wp-content/plugins/wow-breaking-news/wow-breaking-news.php
3. Visit the plugin admin page and activate the plugin.
4. Go to the widget admin page and drag it to the sidbar of your choise.
5. Edit the widget settings to customize it for your blog/website.

Done!