I have small syringes (both 1ml and 2ml ones) which you can buy cheaply online or in pharmacies. I also have a jar of baby food, some wooden chews, some antibacterial hand gel (for me), a couple of spoons, a small bag of favorite treats, the name and number of the vet. I might have some other things too but can't remember right now!
Oh, sorry, didn't realize Cypher gave you a link!