With the holiday season accounting for 20 percent to 40 percent of a retailer's annual sales, the 26 days between Black Friday and Christmas this year are crucial. This is especially true for electronics retailers, which are hard-pressed to deliver the season's most anticipated devices, such as wearable technologies, smartphones and tablets. Without having the right products at the right place at the right time, capturing peak spending is next to impossible. Therefore, the following supply chain guidelines are essential for retailers’ holiday success as well as building customer loyalty: