I found a nice way!
Calibre and Goodreads Sync Plugin
The Tutorial is in German, but google is your Friend
A good English Totorial
The Plugin:
After you registered for an Goodreads Account, you can Sync your two Accounts. And it comes with handy extra stuff!
Plugin Forum
My Settings for the Plugin: (view Attached File)
- Shelf: to-read => Add 'Shelf.to read' to column 'tags'
- Shelf: currently-reading => Add 'Shelf.currently reading' to column 'tags', Remove 'Shelf.to read' from column 'tags', Add 'today' to column '#start_read'
- Shelf: read => Add 'Shelf.finished' to column 'tags', Remove 'Shelf.currently reading' from column 'tags', Remove 'Shelf.to read' from column 'tags', Add 'today' to column '#finish_read'
What it does:
1. Add eBook to Shelf "to-read", the tag "to-read" will be added
2. Add eBook to Shelf "currently-reading", the tag "currently-reading" will be added, the tag "to-read" will be removed, the start_read date will be set on today
3. Add eBook to Shelf "read", the tag "read" will be added, the tag "currently-reading" will be removed, the finished_read date will be set to today
Pro:
- Populate fields (with dates) after eBook moved to lists/shelves
- Goodreads Account has some nice Widgets for Homepages or Signatures

- You can customize it with your needs (Columns, Tags, Dates...)
- Online Read-Community
Contra:
- Initial Setup needs some time
- Goodreads Account (but you can set it totally private)
- You have to hit the "Sync"-Button after changes on the lists/shelves
I hope, this will help some people