Good suggestions, here. I will definitely be adding throat lozenges to my list this year (occasionally I’ve been lucky and just randomly had some in my messenger bag, but I really should bring a bag).
For my part:
-The usual gaming stuff (books, character sheet, notepad, pencils, dice, and miniatures).
-If I know a character that I’m using in multiple sessions is going to level up, I generally prepare a cheat sheet of what’s going to change in advance, so I don’t have to mess around with that.
-I always bring my Bobble (water bottle with built-in filter).
-Hand Sanitizer
-Inserts for my shoes (my usual Converses feel like they’re made of metal by the end of a con, otherwise)
-The prescriptions and OTC things I normally take. I also take Echinacea pills during a con – I know it’s a bit woo, but I’ll take whatever I can get to stave off Con Crud.
-Clothing, of course, including one more day than I think I need, plus a hoodie in case one of the rooms is cold (looking at you, Origins Ballroom).
-For food, I generally bring all sorts of snacks (of the nutritious, boring variety), and a big container of actual food (I generally go with a protein and veggie heavy quinoa salad), so I'm not dependent on going out to eat for every single meal. And yes, a bottle of wine.