Shipping is essential when you sell online, and savvy e-retailers know it involves much more than simply sending a box. Shipping can be fun when it creates “wow” moments for customers and drives additional sales. However, it can also be complicated and expensive as you try and navigate things like service level and accessorial charges. Thankfully, there are things shippers can do to avoid the most common shipping problems. 1. Let your customers choose when their package will arrive.