I'm not superstitious but I do have ritualistic kinda things that I have to do. :-/ I always check to see if the doors are locked before I go to bed, at least twice. Before I leave the house or go to bed, I need to account for the whereabouts of both my cats. (This has made me late for school/work/etc at times, because my Melanie is a hiding champion.) I also need to account for their whereabouts when I wake up or come home.
I only wear my purse on my right shoulder, and I only hold the phone to my left ear. I start brushing my teeth on the left side of my mouth. Weird shit like that.