Blend Modes
Layers
Selections
Masks
Refine Edge
http://www.photoshopessentials.com/basics/selections/cc/2014/improving-focus-area-selections-refine-edge/
Refine Edge Video
http://tv.adobe.com/watch/learn-photoshop-cs6/selecting-soft-edge-objects-with-refine-edge/
Watch a video Smart Sharpen Photoshopsupport.com
Smart Objects
Photoshop How-To: Get Smart About Smart Objects
Painting with Light using Photoshop (not the Kelby technique)
High Pass Sharening •look for the how to in the middle of the page.
Lens Correction CS5
https://helpx.adobe.com/camera-raw/using/automatic-perspective-correction-camera-raw.html
http://www.tipsquirrel.com/index.php/2010/06/lens-correction-in-photoshop-cs5/
http://labs.adobe.com/technologies/lensprofile_creator/
Lens Correction CC
http://www.peachpit.com/articles/article.aspx?p=2111972&seqNum=13
Lighting Effects CS5
http://help.adobe.com/en_US/photoshop/cs/using/WSfd1234e1c4b69f30ea53e41001031ab64-7959a.html
Actions found on the internet, how to use them, why to use them.
http://www.colorvaleactions.com/shop/actions/download-free-photoshop-actions
Oreilly Digital Media: Automate Your Favorite Photoshop Routines http://www.oreillynet.com/pub/a/oreilly/digitalmedia/2006/07/13/automating-photoshop-routines.html
Brushes
http://www.brusheezy.com/
http://getbrushes.com/
These are just a few websites, google free photoshop brushes.
Artists and Links to Explore:
LV 2013 Photoshop World Keynote. Brooke Shaden around the 15minute mark.
http://www.youtube.com/watch?feature=player_embedded&v=yk5JiVby7eQ
http://brookeshaden.com/gallery/
http://www.josephford.net/aerial.html#/0 – diptychs
http://www.blendimages.com/
http://www.corbisimages.com/stock-photos/collection/crush
http://www.johnlund.com/
http://colinanderson1.wordpress.com/ •this looks great