These are photos processed for photos I am showing on the Flickr community pages. Typically viewers on Flickr are not interested in any processing - they want to see (hopefully) good images.
Vintage photos: The originals (torn, low-contrast, creased images) are shown here for comparison purposes.
My own images: The comparison typically shows before/after HDR processing.
Literature:
(Note that these books may cover older versions of Photoshop. The techniques presented there are still useful and just require some slight modifications accessing PS menus and functions etc.)
Photoshop Restoration & Retouching by Katrin Eismann, New Riders, 2006
Photoshop WOW! Book by Linnea Dayton & Jack Davis, Peachpit Press, 1998