Anyway... back to the thread...
Slightly unusually for a Canadian prairie boy, my sports obsession (and hence main source for superstitions) is European football in general, and Arsenal FC in particular. When I was a grad student in Scotland I had a number of footie-related superstitions that came and went:
Ordering a pint only before kickoff or at half-time, never while the match was in play. OK. Make that ordering two pints to make sure I could make it through the 45 mins... I was convinced that either I would miss something crucial, or more importantly disaster would strike if I wasn't watching. And one of the few times I broke that rule, Ryan Giggs scored *that* damn goal in the FA Cup semi, so I may have been on to something.
I used to travel up to Forfar (Mom's ancestral hometown) to watch the abysmal Forfar AFC on a regular basis and of course had to stand in the same spot on the terrace every time. That one didn't really work as disaster strikes as a general rule if you're a Forfar supporter. :)
But to be honest now that I'm away from the saturation of football in which I used to live, I think most of my superstitions have disappeared as well.