I've also gotten little mini-bags of flavored/special coffees. You know, the kind that make only a few cups?
My mom always used to get us AA batteries, pens, pencils, etc.
There would always be an orange in the bottom, as well as nuts - walnuts, brazil nuts, almonds. All in shells of course. You could include a nutcracker. (Just make sure they aren't allergic!) Life savers, gum, jolly ranchers. Stuff like that.
Those little daily calendars with a saying or quote for every day.
Our dollar store has lots of really nice candles that would make great stocking stuffers.
Living in Montana, I can get special made-in-Montana goodies. Huckleberry candies & huckleberry chocolates are favorites with my out of state family.
The local Walmart pharmacy has a section that has miniaturized travel stuff. Soaps, shampoos, etc. I love that stuff!