gistfile1.rb

class Organizations::CellWeeklyReportsNotSent::CellWeeklyReportsNotSentIndexController < ApplicationController
  #método repetido em vários controllers
  def current_user_organization_connection
    @current_user_organization_connection ||= UserOrganizationConnection.where(:user_id => current_user, :organization_id => params[:organization_id]).first!
  end
end

class ApplicationController < ActionController::Base
  #caso o métododo repetido for uma permissão, recomendo que extrai para um módulo para ficar mais organizado. 
  include CellsPermission
  def current_user_organization_connection
    @current_user_organization_connection ||= UserOrganizationConnection.where(:user_id => current_user, :organization_id => params[:organization_id]).first!
  end
end

module CellsPermission
 #permissions....
end

class Organizations::CellWeeklyReportsNotSent::CellWeeklyReportsNotSentIndexController < ApplicationController
  #utilização da permissao
  before_filer :permission

  #utilização do método no application controller
  def any_method
    do_somethign_with(current_user_organization_connection)
  end
end