One handy trick I've found is that when you're visiting a Drupal page and you notice that you're not logged in, you can simply add user?destination=
into the URL right after the root of your Drupal site and keep the path. This means that
http://eporama.com/ramblings
becomes
http://eporama.com/user?destination=ramblings
Then when you log in, you're brought back to the page you were viewing with no fuss.
I do this often enough that I decided to make it a bookmarklet.