Keyboard Viewer

Go to System Preferences > International > Input Menu and enable Keyboard Viewer. Also make sure Show input menu in menu bar (at the bottom) is enabled. Click on the International icon at the top right of the screen (should look like a U.S. Flag). Select Show Keyboard Viewer.

You now have access to all of your active fonts and what they look like according to your keyboard layout. Everything changes dynamically as you hold various keys such as shift, command, option, etc. Click on the + to make it bigger. No more guessing where that cross or bullet is. Leave it open while you type and watch all the keys flash, people will think you’re special.