Lip balm, fancy pens, silly socks, small baking items (like a spatula), playing cards, small hand sanitizers.
You might want to poke around the dollar+ store, see what you find. I've gotten cute luggage tags, a little coin purse (probably meant for a 5yo, but I get so many compliments on it!), little notebooks, and so forth. You just never know what you'll find. I wouldn't get candy there--it's the cheap stuff. For a stocking stuffer, I'd hit Walmart and get the Lindt little package (holds ~3 candies, but they're the good stuff!)