First of all, I stocking shop all year long... whenever I see something small, I buy it and tuck it away. Otherwise, I get stuck in December with no ideas that I like ;) The warm weather ones (think sidewalk chalk, bell for bike and bubbles) get saved for the Easter baskets.
Secondly, some things that I have done or will do are socks/tights, watch, flash cards, finger puppets, Terrible Towel (cause we bleed black 'n gold), maracas, CD, hair clips, potato head parts (not the potato, the accessory kits), View Master disks, Thomas trains, slippers, walkie talkies.
Finally, I always do an ornament for each of the kids. My mom always did this for my brother and me. After I was on my own, she wrapped up all "my" ornaments and gave them to me to decorate my first tree. Many of them have a name and/or year, but all are personal in some way - favorite character, sport, activity, etc.