Usually you'd break down your own methods by module, class, or whatever 
logical divisions exist within the code.

maybe something like

utils.rb
-string/
-->string_helpers.rb
-uri/
-->uri_helpers.rb


utils.rb
_____
require_relative 'string/string_helpers'
require_relative 'uri/uri_helpers'
_____


string_helpers.rb
_____
module StringHelpers
#methods...
end
_____


uri_helpers.rb
_____
module UriHelpers
#methods...
end
_____

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