Not sure if this is common knowledge, but long-pressing your soft keys can bring up useful shortcuts for you.
Menu - Long pressing menu will bring up a software keyboard no matter where you are. I'd imagine this is more useful for phones that don't have a hardware keyboard, but I've found use for it in Quickoffice when I wanted to use Swype, since Quickoffice doesn't automatically bring up a keyboard.
Home - Long pressing home will bring up your 8 most recently accessed apps.
Back - As far as I can tell, it doesn't do anything.
Search - Long pressing search of course brings up the voice command prompt, which we all love so much.
Menu - Long pressing menu will bring up a software keyboard no matter where you are. I'd imagine this is more useful for phones that don't have a hardware keyboard, but I've found use for it in Quickoffice when I wanted to use Swype, since Quickoffice doesn't automatically bring up a keyboard.
Home - Long pressing home will bring up your 8 most recently accessed apps.
Back - As far as I can tell, it doesn't do anything.
Search - Long pressing search of course brings up the voice command prompt, which we all love so much.