Many of us will not walk under a ladder. Now there is some merit in this because you might end up with a cleaning bucket or a can of paint on your head. Those of us who believe that the spilling of salt could be a sign that the devil is waiting to enter you are wont to throw a handful of salt over our left shoulder ostensibly to blind the devil. If you are in a restaurant, the flung salt may end up on the designer clothes of someone behind you and then you are really in for a run of bad luck. Some of us though not given to superstition may feel a twinge of unease on Friday the 13th. Wearing charms and amulets to ward off evil is quite popular irrespective of the fact that one is rarely confronted by evil on a daily basis. In certain parts of Europe, the tucking of a clove of garlic under one's pillow or wearing it on one's person was said to fend off any nocturnal attack by vampires. Apart for it being an assault on the olfactory senses, we have never heard of a marauding vampire shrinking in horror in the presence of garlic except in the movies.
We know you are made of sterner stuff than to believe all this. But do keep this editorial for ready reference just in case your left palm starts itching.