What is something you worry about everyday? How long has it been plaguing you? Do you think you'll ever overcome it?
Saying/doing stupid things. I'd say the first time I thought about something I've done and decided it was stupid was in fourth grade, so that means it's been plaguing me for 7 years. I don't think I'll ever overcome it since I have a problem with random associations in which a word or phrase could remind me of something else that I get distracted by and start thinking about until a word or phrase from it reminds me of another thing, etc.; thus, any given word or phrase could ultimately remind me of something stupid I've said or done even if it's completely unrelated. (In fact, I'd say that about 20 to 50% of the times I've gotten distracted like this, at least one of my random thoughts was about something stupid I'd done.)
And, of course, it doesn't help that I keep doing stupid things... :(