CMD+TAB lets you switch applications
Shift+expose, dashboard, spaces, stacks etc will make them show up in slow motion.
CMD+Q quits an app
CMD+W closes a window
CMD+M minimizes, CMD+H hides.
lots of cool terminal tricks, i recommend you google them.
Tinkertool is a great app for random system tweaks
This is a great site, http://www.macrumors.com, good forums, news, rumors, etc.
There are also applications you should download, such as for example Flip4Mac.
Keep up to date by often clicking on software update in the menu.
this is a great tool to keep your MISC non apple products up to date automatically: http://metaquark.de/appfresh/
Some people don’t like ichat, i do personally, but heres a good tool that lets you use all your IM accounts: http://www.adiumx.com/
Also set up Mail, if you could tell me what webmail service you use, I can give you directions to set it up.
I recommend pretty much any Leopard like application, very pretty looking ones are out there
Here is a tool that will completely uninstall mac applications for you, just drag them into this application: http://www.appzapper.com/
Deleting the application can leave preferences plists and other application folders behind. A similar tool considering space, is this one: http://www.xslimmer.com/
It will take out the unnecessary binary and code out of applications. Though I only recommend it on NON-apple applications, and maybe some pretty dependent applications you use. It will tell you if deleting excess code will “destroy” the application
If you like spaces, “pushing” a window to the side of the screen will actually push it into the next space. CTRL+ arrow keys/space number will take you to the specific space.
CMD+, takes you to Preferences in pretty much any application. Though some are coded differently, such as in carbon maybe for example and do not work like that. But most do.
In safari, Shift+CMD+[ or ] will switch tabs, works in Firefox too I believe. delete (the big one on the keyboard, not the one under fn, next to end if you have a full size keyboard), and Shit+backspace will make you go forward. yes i do realize i said, “shit”, it did that on purpose for the humor of it LOL
In finder, Shift+CMD+A brings up the applications folder, Shift+CMD+D brings up your desktop. and Shift+CMD+H will take you to your home folder (no duh).