I will sometimes attach a little heart or medallion fob that I find at a Japanese bookstore like Kinokuniya. Very cute stuff from Japanese sellers on eBay.
Can't do the scarves, I'm too fussy with them. I prefer my bags with a tiny bit of jangle. My double-sided Chanel has a tiny faceted crystal fob on the inner chain, so I know which side (which houses wallet) to carry closer to my body. I also place fobs on one side of double handles when I need to see quickly which side has the interior pocket.