Back when conference registration first opened there was a thread on RD. "What kind of promo should I bring for the Goody Room?" "Does anyone know a good printer? How many bookmarks should I bring?"
I've never been a fan of bookmarks even though they're industry standard. I like the mavericks. Hand-poured candles in tins. Wedding favors. The woman who plastered her book cover and info on energy drinks, and my favorite--the erotica writer who printed her info on cherry red condoms. I got a couple for my cp and wonder if he ever used them.
During that in-person workshop I did a few months back, someone asked me about bookmarks. Not that it's my "other" favorite soapbox, but if you had to have them at least make sure they have value added. Like Michael Hague's "Six Stage Plot Structure" bookmarks. They're on good heavy stock, easy to use, and showcase his contact info. I still have mine, I keep it taped to my whiteboard. Maybe a recipe? A knitting pattern? A genealogy if you have a complicated story tree. Pictures get old fast, and in a sea of similar bookmarks, disappear.