Obscure superstitions and whatnot you believe in even if you fancy yourself a fussbudget

http://en.wikipedia.org/wiki/Sweater_curse

I don't believe in curses but I believe in the sweater curse (or 'boyfriend sweater curse' as it's called)

I don't believe in magic but I believe in Olivia Newton-John's MAGIC
https://www.youtube.com/watch?v=r7WPwH8Rd6g

http://en.wikipedia.org/wiki/Evil_eye#In_Judaism

Many Jews avoid talking about valuable items they own, good luck that has come to them and, in particular, their children. If any of these are mentioned, the speaker and/or listener will say "b'li ayin hara" (Hebrew), meaning "without an evil eye", or "kein eina hara" (Yiddish; often shortened to "kennahara"), "no evil eye".