Principal of the school walked in right in the middle of my wonderfully worded tirade about how much I hate the principal of the school. Doesn't sound too bad until you realize I was on the podium talking into the mic because the faculty was late for the assembly, so it happened in front of the whole school.
If you could tell anyone in the past, any one thing that you know would make the future better, what would you say to them? (Let's assume this is a paradox-free question that can't result in you not being born, etc.)
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