There really is no need to go to the post office at all when you print your own labels from home. you can schedule a pick up the evening before and the postie will pick them up from your doorstep.
You can also order boxes and envelopes etc and they will drop them off at your doorstep. Saving you time to get on with your day. Of course some people love the social aspect of going to the postie. For me, the saving of time, gas and wear and tear on your vehicle…… The daily pick up is the way to go.