One of the main characteristics associated with a good portrait is a well accentuated subject. In order to make the subject stands out from the rest, you can consider various strategies. Most of the photographers consider Bokeh effect as an effective method to accentuate the subject of the portrait.
Nevertheless, you can make the subject stands out perfectly using lighting on the scene. By adding some artificial light to the most ideal spot, you can make a subject stands out from the rest. When the artificial light illuminates the body of the subject, he or she will automatically be highlighted from the rest of the scene. However, you can accomplish the same objective without relying on artificial lighting; you can do that by providing substantial amount of contrast.
You can simply backlight the subject and expose it to the shadows. It will make you stand out from the rest of the scene. Although you are likely to lose some highlight details with this effect, you can surely make the subject stands out from the scene.