RubyMine smartly analyzes the features you use most often during your development sessions, and reminds you of the features you might have missed.
The Productivity Guide dialog, available in , displays the list of features with usage statistics and tips.
Besides analysing your personal usage of features, you can discover similar features that you've never used. One of the ways to do so is to sort features by Group, and look for unused features that are next to the frequently used ones. You can quickly check how to use the feature by selecting it and studying the corresponding tip that opens.