title: Custom actions in Django Admin
body: <p>in my Django app i have a Newsletter model. Now I'd like to be able to <strong><em>send</em></strong> the newsletter (and even <strong><em>resend</em></strong> it) from Django Admin.</p>
  
  <p>I could do this with a hook on the <code>Model.save()</code> method but is there another way that is not tied to the Model?</p>
  
  <p>Thanks</p>