Keep those Before and after Pics flowing! Remember, not sure what to do in Camera Raw? Click the "Auto" button... doing that usually reveals big hints at what you need to do!
When you have a photo where global edits in Camera Raw cannot process detail in highlights (sky) and shadows (landscape) or other similar situations without blowing away details in one or the other... Use smart objects to merge a blending of 2 copies of the same image, one processed for highlight recovery and the other(s) for mid-tones and shadows.
Using Raw Smart Objects in Photoshop
The Photoshop "Power Tool" -- "The Quick Selection Tool"
Key board short Cut The "W" Key
Here's a video by Martin Evening Demoing CS5 The Quick Selection Tool and "refine edge"/"refine masks"
Click here for The video