actions

Some good Drupal developer guides or reference pages

Forms API

• Referencec 6.x http://api.drupal.org/api/drupal/developer--topics--forms_api_reference....

CCK

• Some info about CCK widgets http://drupal.org/node/823858
• CCK widget http://poplarware.com/articles/cck_field_module

Views

• Views online help http://views-help.doc.logrus.com/admin/advanced_help/views

Theme

• About overriding themable output http://drupal.org/node/173880