Jesus on a keyring that dangles from a hair-tie. Whenever I'm in crisis, you'll find the hair tie wrapped around my hand and my fingers poking through the key ring. I cling to my God when I'm in need. Even if He doesn't answer, just knowing He is there helps calm my fears.
During times where I don't feel so clingy, I hang this from the pull chain on my overhead light/fan. It twinkles a bit at night.
And before anybody asks, I'm Catholic.