Photoshop CS5 basic guide and keyboard shorcuts

• http://www.dummies.com/how-to/content/photoshop-cs5-allinone-for-dummies-cheat-sheet.html
• http://www.pxleyes.com/blog/2010/06/the-simple-photoshop-cs5-cheat-sheet/ 

Here are just a couple of useful links with the most important things to know about Photoshop and some of the most important keyboard shortcuts that will increase your productivity.