A collection of useful UI tools for working with fields:

• Overview of fields with links to edit single instances, and all instances at once
• Clone any field instance to multiple entities and bundles
• Clone all field instance of a bundle to multiple entities and bundles
• Import and export fields
• Delete multiple instances of a field
• Apply a vocabulary to multiple entities and bundles at once (the same way vocabularies were applied to content types on Drupal 6)
• ... your idea here. Patches welcome!