Accept nested attributes in order to allow for some easy form to enter emails and phone numbers.

app/models/contact.rb

@@ -1,4 +1,7 @@
 class Contact < ActiveRecord::Base
   has_many :emails
   has_many :phones
+
+  accepts_nested_attributes_for :emails, :allow_destroy => true
+  accepts_nested_attributes_for :phones, :allow_destroy => true
 end