You can never go wrong with a long cardigan, it really dresses up a casual look. Also, there's something safe about a long cardigan - not so much a safe style choice, but fabric wrapping itself around you. Lately, I've been feeling really down, so getting dressed up and feeling good and safe is the key to my outfit choices.
Sometimes when I feel like shit, I try not to go straight for the sweatpants, but instead dress myself up. Seeing yourself looking good, when you're at your lowest, is the first step in medicine. You may be putting on a face, but eventually you'll believe what you see: a happy, strong, and oh so stylish woman (or man if you are one).