Significant speedup:   APC <- alternative php cache view cache (under view’s configuration:   View content cache:  http://drupal.org/project/views_content_cache css/js aggregation: https://drupal.org/project/advagg   Other modules:  Boost, authcache   Configuration -> Development -> performance:  enable whatever cache checkbox you see. Disable developer module putting ?blah after css and javascript files, since this prevents caching.