WSOD - White Screen of Death - Drupal

Almost every WSOD that I have come across while using Drupal has been a problem with the memory limit for PHP.

To fix this, edit the 'settings.php' file for your Drupal install (the file will be in /sites/default)

Add to this file the following line:

ini_set('memory_limit', '64M');

In my experience, that will fix approximately 90% of the WSOD problems!