Migrate! It Works, but is Hard

There are several classic modules almost every Drupal developer will need to do custom development work.  Modules like Views, Entity API, and Rules are commonly used in custom solutions.  The Migrate module is quite powerful for site-wide data transfer as well as large data imports.  This talk focuses on the Drupal 7 version of Migrate.  I'll be attempting to distill years of working with this module down to the most useful tools, tips, uses, gotchas and workarounds I have employed.