Naming methods
More than local variable naming, instance variable naming, and most constant naming, method naming is probably the most important naming in Ruby. The only other naming that is roughly as important is class and module naming. However, in general, there are significantly fewer classes and modules than methods, so you will be dealing with method naming more often.
The Ruby core team recognizes the importance of good method naming, and sometimes there are Ruby features that are considered desirable by the core team but are not accepted into the language, simply because a good method name has not been proposed for them.
One reason why method naming is so important is that method names are difficult to change without breaking backward compatibility, at least if the methods are public. Another reason is that method names have a large effect on the understandability and user-friendliness of the code, especially if they are called often.
In Chapter 3, Proper Variable...