Adwords Editor is a great tool you can use to edit your campaigns quickly in bulk. This tool is a must have. You can download accounts, import and export files to make changes to an account, view statistics for your accounts, copy and move items between ad groups and keep working when you’re offline.

To download the Adwords Editor and to learn more about how to use it, you can visit:
http://www.google.com/intl/en_US/adwordseditor/