Sunil Kumar provides tips for making a good first impression in a job interview. He advises to pay attention to grooming and appearance, with hair brushed, minimal makeup for women, clean teeth, and conservative business attire like suits for men and women. For both, he suggests limiting jewelry, perfume, and avoiding stained, ripped, or ill-fitting clothes. Some things to leave at home include coffee, cell phones, music players, gum, and excessive jewelry. The goal is to look polished and professional from the moment an employer first sees you.