Show Personality in Your Profile Photo
Anyone can put on a dress shirt and smile nicely for the camera. In fact, that's what many people do for their profile photos. But why look like everyone else?
Your profile photo is a chance to show off your personality and uniqueness. Get artsy and creative with it (the levels of this vary for different professions, so use your best judgment), while at the same remembering to keep the photo professional and simple. Focus on showing your face and neck, and forget about a full-body shot. You should look friendly and reliable, but also like you're not trying too hard.