My dog was a rescue and his name had been Thumper before we adopted him. My parents didn't want to confuse him by giving him something completely different so we changed it to Tucker. His name being Thumper always makes me laugh though.
Coffee. I'm an addict, really. It's a problem. I can have coffee whenever - day or night.
Other than that, water. Sometimes fruit infused water just to give it a little flavour.