While at a library conference, run around the vendor booths collecting free give-aways like a whore in a cucumber patch. Grab the free bookmarks, catalogs, tote bags, and flashlight pens with a desperate, wild-eyed passion that would scare your non-librarian friends. Need and practicality are not issues in the vendor booths. ("It's a highlighter AND a laser pointer?! Brilliant!!") It's all about getting as much free crap as you can fit in the rolling suitcase you brought along just for the occasion.
In order to make the most efficient use of your time, don't look vendors in the eye. Just grab the freebies by the handful and go! Do, however, stop to acknowledge the vendors whose companies have obviously spent an egregious amount of research and development money coming up with new ways to reinvent the ink pen. Let them know that they are the ones who keep the librarians coming back.