Starbucks (iced green tea/lemonade in the summer, pumpkin spiced lattes in the fall, hot chocolate in the winter). That's my one serious vice. I have to have one in hand within 5 minutes of leaving my home to run errands. I kind of feel naked without it!
I will add scented candles, itunes, Pringles chips, Christian Louboutin and a certain art gallery that I've been buying from to that list though.