It is best to be familiar with the PS environment, but knowing these shortcut keys makes editing fast and easy.
Juz' a newbie, and still learning this stuff from the web and different sources. So I'm posting tutorials using only short-cut keys for editing, this also serve as my QUICK CHEATS. I do not own any of them and I do acknowledge where its from so a source link is provided.
To see complete shortcut keys
You can download this file PhotoShop CS3 Keyboard Shortcuts