Access the File Inspector with Command-Option-i
You can access the File Inspector, a Quicklook style version of the Get Info command, by highlighting any file and then hitting the Command+Option+i keys, this is very useful because it allows you to select other files and pull up data about them upon click/selection rather than opening another Get Info window. This behaves very much like QuickLook, and the window will close if you select the desktop rather than an icon, or it loses the focus. Very useful, try it out!
Note: another way to access the File Inspector is by holding down the Option key and right-clicking on an icon, in place of “Get Info” will be “Show Inspector.”