apple + Q will quit the program that is running in front, the name of the program is next to the apple in top right.
apple + tab (+tab, tab etc) will allow you to move through the icons for each of the programs you have open.
Thanks for the tip! I just learned something new today 
... and when you're tabbing through apps, you can (with Command held down), hit CMD-Q on the currently selected app to quit it without giving it focus.
Again, thanks for the tip!
I had a real problem with the never-ending beachballs when in ViewNX. I clicked on "Open in CaptureNX" on the top menu bar and the beach ball kept spinning for several minutes. . I finally had to use Force Quit and thankfully the never-ending beachball finally disappeared.
Finally, I discovered something quite accidentally a few weeks ago. I had become very annoyed at how the Delete button operates on a Mac. When I click on fn (I think it stands for function) at the lower left hand side of the keyboard and Delete at the same time, it operates like the Delete key in Windows. After that I was a very happy camper
It's amazing how the little stuff that you think wouldn't bother you can make such a difference!
Ellen
