Take deoderant, lens solution and mouthwash. Those are pretty much the only pharmacy things that you cant get here at a normal price.
Also, you probably dont need a heavy winter coat. Last winter was very mild. I used a wool short jacket thru the whole winter.
And there are places to order blankets and pillows here beforehand – they even deliver to your seminary. I think one is Blanketexpress.com
Dont bring seforim- You can buy e/t here probably for much cheaper.
Some people are finnicky that their paper should have three holes and not the Israeli two but then you also have to bring looseleafs and every time you run out of paper you’ll need s/o to send from America, cuz they dont sell it here