Today, December 14th, is scheduled to be the busiest day of the year for post office workers. The U.S. Postal Service says they expect to get 900 pieces of cards, letters, and packages today. If you are looking for a way to avoid the holiday rush check out usps.com. The website will allow you to pay for postage, print mailing labels, and even schedule a time for a mail carrier to pick up your mail free of charge. I went through this website myself and I found it very easy to navigate each page. Here are a couple of things to remember. Monday December 21st is the official cut off day for sending letters, cards, and priority mail in time for Christmas. We are also told that December 23rd is the deadline for express mail.