Use Pry (Rails) and Awesome Print outside of Bundler in Rails 3 (when other Rails developers don't want you adding good stuff into Gemfile)

.irbrc

begin
  require 'pry-rails'
  require 'awesome_print'
  Pry.start
  exit
rescue LoadError => e
  warn 'Unable to load gems'
  puts e
end

global-gems.rb

if defined?(::Bundler) and File.exist?(ENV['GEM_HOME'])
  $LOAD_PATH.concat Dir.glob("#{ENV['GEM_HOME']}/gems/*/lib")
end

Place the global-gems.rb in Rails config/initializers/ and add to .gitignore if you only want to keep it to yourself.

Install global gems:

gem install 'pry-rails'
gem install 'awesome_print'

rails console