Photo Booth gives you a fun way to take selfies on your Mac, using your Mac's built-in iSight camera (though it works with third-party cameras too). Simply launch the app and press the red camera button to take your picture. You can apply effects to distort your image, add cool color effects that simulate comic books or old time sepia-tinged photos. You can even separate yourself from your background and add in fanciful backgrounds, including many you can create yourself, all with the touch of a mouse button. Experiment with Photo Booth and see what you can come up with!