title: Quickest way to return to rails
body: <p>I haven't touched Ruby/Rails for about a year now and need a quick reminder: what's the quickest way to update to the latest version of gem, rails, rake, etc? I want to create a new project from scratch on top of the latest versions. Here's what I have now:</p>
  
  <pre><code>$ gem --version
  1.3.5
  
  $ rails --version
  Rails 2.3.5
  
  $ rake --version
  rake, version 0.8.7
  </code></pre>