Here are a few other ideas for finding a good angle. Know your "good side" and take the photo from that side of your face. It's the side of your face that looks the most balanced and symmetrical. Angling the camera slightly above yourself and taking a snapshot of your face and chest will highlight your cleavage. Since this position is fairly unnatural, odds are, you already know what the camera will focus on when you take a selfie like this.
