New to using Features or Drush? Or maybe you don't use them together. You should read this post from BeFused and start using features from the commandline. It really is the best way to build your features.
While building Drupal websites, we end up building modules for all sorts of random tasks – anything from simply reorganizing the contents of a node object or adding fields to the Site Information page to views plugins or huge integrations.
Everyone needs to have a backup plan for their live site. Not only can your server's disk get corrupted, but you can also erroneously overwrite your site with bad code or bad data, or your site can get hacked.