Tricks for a new Apple MacBook?

I just got an Apple MacBook and am fairly new to Mac in general, I'm wondering if anyone out there could show me the ropes, or give me some tips on my Mac, any cool hidden features. Any useful downloads.

Thanks,

PS: Get a MAcBook, they rock

The hardware is pretty straight forward and you don't need any tricks to use it.The OS has a lot of features in it that can be explored when you get bored with other things. Check Macworld.com for articles and all sorts of tips and tricks.
the widgets are pretty cool, boot camp is cool too