If you are shopping around for a courier service to meet your business needs, it's important to know what you need to look for. Here are just a few considerations. 1. Availability Availability is one of the more important things to ask for. If you often require same day service, for example, make sure the courier you choose can provide an expedited option. For businesses that often need to send items further afield, even overseas, verify that not only does the courier provide this service, that their shipment schedule will fit your time tables.