A RAW + JPG Workflow
Did you know that RAW files contain an embedded jpeg that is identical to the in-camera jpeg? In most modern cameras, that embedded jpeg is full sized.
So, when shooting raw there is really no reason to use RAW+jpeg. Save the space on the flash card and the time to transfer the duplicate jpegs to a hard drive and the need to clean up after.
When you browse raw files with FastStone, it shows you those embedded jpegs (FastStone can not decode the actual raw data). Same as browsing separate jpegs. And you can still do temp "what if" edits in FastStone. You can use FastStone to delete the discards, or drag-and-drop the "maybes" to a separate folder.
Also, the Adobe DNG Converter has the option to include the embedded jpeg in the DNG file. It actually has three options for no jpeg, medium, or full sized. The medium jpeg is 1024 pixels on the long side. Good enough for quick reviews. The no jpeg option is a lie, it still embedds a small 256 pixel jpeg.
So, if you are a true DNG fan and don't plan to retain the original raws, a much simplified workflow is:
1. Use the DNG Converter to xfer files directly from the flash card to hard disk, with a medium or large jpeg.
2. Browse, sort, rate, cull those DNG files with FastStone (or Bridge or LR or whatever).
Later (probably much later) you can re-process the DNG files with the DNG converter and strip off the embedded jpegs if you want to cut the disk space a little. The DNG converter will take a DNG file as input and output it with new jpeg preferences.