My iTunes sync completes, but my iPod doesn't get any music. What can be done? Device : iPod Shuffle 2nd Second Generation
OS     : Windows 7 64 bit

My steps were as follows 



I checked the "Sync only checked songs"



Even though i checked some songs before syncing, i did not find any of them in my iPod. The sync completed without any error output.

Settings tab



Contents tab
There is an Autofill button that you must select (click) before syncing to get the music onto the device.