The guys at Stamps.com have just released the 2013 Stamps.com Holiday Shipping Guide. The PDF file provides shipping best practices and tips to help online sellers run an efficient order fulfillment program during the holidays.
Whilst some of the information is tailored for the US retailer, there are plenty of tips in there that are applicable regardless of where you are based.
Importantly as well the Holiday Shipping Guide also contains the last posting dates with USPS so if you’re using them to despatch your ecommerce orders download the Holiday Shipping Guide and make sure you publish the deadlines on your own website to keep customers informed.