DIY error monitoring for Ruby

As an indie developer, one of the most exciting achievements is when users happily sign up and start using your app. What's not exciting, however, is having to deal with the errors and exceptions your users will eventually encounter. To ensure that your app offers a good user experience, you want to be notified when exceptions are encountered that so you can deal with them as soon as possible. You can get help with this task from a professional error-monitoring solution, such as Honeybadger.