As aforementioned, Drupal migrations give you many tools to migrate content, but these are some of the basics to get you started with D6 to D7 migrations for OSU’s site content. More information on all these topics can be found in Drupal’s API and in various issues on I found some of these pages to be useful when learning about migrations:

 A good introduction to migrate_d2d:

More information on prepareRow():

Field mapping:

Registering migrations:

Migrations with Organic Groups:

Drush Migration Commands: