I've picked up the habit/silly superstition of knocking on wood. And it's not just when I say something that might be unlucky, it's when I think it. If you've got a sadistic mind, this would pose quite a problem- you'd be knocking on wood like every 5 minutes. I'm kinda obsessive compulsive, so I'm like powerless to stop myself; I know it's stupid but I can't help but do it. And, I mean, while I've been knocking on wood, none of the bad stuff I've envisioned has happened, which makes it even harder to kick the habit because my subconscious thinks it's working and if I stop, bad stuff might start happening! Arrrrgggg... it's probably just a phase...

"I've never had to knock on wood
But I know someone who has
Which makes me wonder if I could
It makes me wonder if I've never had to knock on wood
And I'm glad I haven't yet
Because I'm sure it isn't good
That's the the impression that I get."
~Mighty Mighty Bosstones "The Impression That I Get"