While the not-yet-released iPhone is rumored to have a front-facing camera, previous models (obviously) do not. So, if you're faced with the challenge of taking your own photo with your iPhone (come on, we've all done it), there's an easier way than just standing in front of a mirror.
The iPhone camera doesn't take the photo when you press the camera button, it snaps the image when you release it. So, in order to take a self-portrait, open the camera app and place your finger on the camera button, but don't release. Then, you can turn the phone around, extend your arm, and take the shot. For an extra-helpful touch, make sure your phone is out of silent mode, so you'll hear the "click" of the shutter's release.
I'll be posting a new photography tip every day in the month of May, so be sure to check back for more helpful tips, techniques, and apps to take fantastic photos.