Use total quality management in order to decrease ratio of defective products; provide a wide range of products for on-line store; use high quality packaging and wrapping; avoid selling harmful / dangerous products and fake / counterfeit products; inform consumers about refurbished products; provide consistent and adequate labeling of products; provide post-sale service such as repair, maintenance, and technical support; provide online technical support or assistance; choose suppliers and partners that can support product warranties and guarantees; provide product documentation within package and on website.