Useful Hotkeys

[Oneiromancer]

I'm looking for a list of the most useful hotkeys and shortcuts in photoshop. Three things I wonder about in particular:

1) Are there keys to quickly increase or decrease the opacity?

2) Are there keys to quickly alter the color or brightness?

3) Are there keys to quickly moving (left, right, up or down) your work while you are zoomed in?

 

[Peano]

I'm looking for a list of the most useful hotkeys and shortcuts in photoshop.

Look on Google. Tons of lists.

 

[Oneiromancer]

Allow me to correct myself? I'd like a small list of the most useful ones. Well, actually mostly for the actions mentioned above. I can't seem to find hotkeys for those.

Also, I can't seem to find the hotkey for the blur tool in PSCS4, not even here: http://morris-photographics.com/photoshop/shortcuts/downloads/PSCS4_Keyboard_Shortcuts_PC.pdf