Can I stop being superstitious now?

I am one of those people who:

• have lucky boxers
• always pick a favorite number
• never walk under ladders
• turn around in case black cats cross their path
• and tend to be more cautious on Friday the 13th
  

Of course, there's a rational side to me that seems to overrule most of the weirdest behaviours. And yet it's definitely not a cut and closed issue. I do feel better if I pay attention and avoid all those things mentioned above. After all, if you feel you've had bad luck, you're gonna act accordingly. And that will get you into trouble very quickly.