Midwinter is winding down, and many of us are now in possession of bags and bags full of free swag. Books, tote bags, books, pens, books, posters, books … you get the idea. Instead of trying to squeeze all of your finds into your luggage, consider using the Post Office that’s right on the exhibit hall floor. That’s right. You heard me. There is a temporary U.S. Post Office right on the exhibit floor. I mail all that stuff home. No more struggling to lift that carry on bag into the overheard compartment. No more repacking at the airport so my bags aren’t over the weight limit. It is so much easier than trying to haul them to plane, train, or automobile. And the added bonus is that I get a package in the mail a few days after I get home. And there are always a few surprises in…