First up? Changing screen resolutions on multiple monitors.
I'm sitting here typing this on a MacBook Pro with a 23 inch Apple Cinema Display HD attached to it. It is truly a Mac geek's dream. To the right you see the drop down menu from the Display menubar item. Notice that each monitor has its own section, and that you can control the resolution independently. Pretty sweet, huh?
Read on to find out how to turn the Display menu item on, if you aren't sure how to do it. Otherwise, revel in the glory of this small touch that makes using a Mac such a pleasant experience.