The key to looking good in photos? It's all about your jaw, as photographer Peter Hurley explains in this video. Essentially, stretch your forehead forward and down a bit to accentuate your jawline.
It's a long video (15 minutes), but full of examples that clearly illustrate how to position yourself and your head. Scrub to around the 7 minute mark for the photo examples, including this very convincing one (posted by Redditor 0xFFFFF):
The tip to stick out your forehead is an update to Hurley's previous advice to stick your chin out (and squint slightly) for better portrait shots (because it's really chin out and down, but even then he says you can get weird things going on with the chin). Remember to do this when you're laughing in photos too, to avoid the natural tendency to bring your head back and create a double chin.
Check out more tips for looking better in photos, including how to become more comfortable in front of the camera, or share your own in the comments.
It's all about the Jaw! | YouTube via Reddit

The key to looking good in photos? It's all about your jaw, as photographer Peter Hurley explains in this video. Essentially, stretch your forehead forward and down a bit to accentuate your jawline.
Most everyone has heard that it's a good idea to find your "good side" to help you take better pictures and a new study published in Experimental Brain Research suggests that your good side is probably your left side.
A great portrait involves attention to many details, including camera, framing, color, and lighting. But you can help a shooter out by doing a few photogenic things: stick your chin out a bit, squint ever so slightly, and part your hair to reveal your good side.
A lot of us hate having our picture taken, but family members and friends insist on doing it anyway. If you freeze and then end up looking like a deer in the headlights in every photo, there's a few things you can do to prevent it from happening.
We all have ways of coping with a photo being taken. Sometimes that means making a surprised face, other times it means we pretend to look like we're having more fun than we really are. In reality, you probably just need to relax and stop thinking so much about it. I talked with Luceo Images photographer
One of the reasons we get nervous having our pictures taken is probably due to the fact we're imagining this image being stored in a family photo album and we want to present our best side. Instead of fretting about your hair or how much you're smiling, prepare yourself ahead of time by getting to know your face a little better.