Can you be more specific?
I've lived with my new Macbook Pro for exactly a week now. Still learning all the shortcuts, but I unbelievable love this thing.
I haven't yelled at my computer in a week. Amazing!
Some basic shortcuts:
Command + Space = Spotlight Finder
Command + Down = Open directory/file
Command + Up = Go back a directory
Enter/Return = Rename file/folder
Control + Click = Right Click
Don't forget the mutlitouch finger gestures.
Google Mac OSX Cheat Sheets.