Is there anything dumb that you used to do on a regular basis? As for me, I have one. I've always used the world "have" when it comes to owning something ('I "have" a headache', or 'I "have" 5 dollars', or 'I "have" been banned once more from the Hatton Forum'). But when it came to needing to something, I would always used the world "half". (' I "half" to go to the bathroom, 'I "half" to hope it rains tomorrow', or 'I "half" to wait before I can give out more rep'). Only with a LOT of help with the poster on the Gordon Lightfoot forums did I break that habit. I was all the way in high school before I finally stopped using 'half' instead of 'have' in my sentences.