What are the best photography techniques for capturing portraits using an 18-55mm lens?

When capturing portraits with an 18-55mm lens, use a wide aperture (around f/2.8-f/5.6) for a shallow depth of field and blurred background. Position your subject away from distracting backgrounds and use natural light or a soft artificial light source. Focus on the eyes and use the rule of thirds for composition. Experiment with different angles and perspectives to create dynamic and visually appealing portraits.