Using RuboCop - Talk Slides
I recently did an internal lightning talk on using RuboCop as a quick and simple way to enforce consistent code style and automatically correct errors. I really can't emphasize how easy it is to set up and even gives you an automatic tool to generate a config file that's as restrictive as possible without violating any rules. The power and simplicity of this one tool has saved me tons of time and is very worth your time to install in your current/next ruby project.