I don't have them. To have a true "never" in your life means seeing something in black and white. I don't believe black and white exist in human life. I could say "never kill someone", but there might be a time that killing someone is not only okay, but the right thing to do. Granted, the only time I see that coming up is a "me vs. them" fight to the death, and I'd do everything in my power to not be in that situation.
I like to think I'm open to any other perspective, though I'm probably kidding myself. Even Hitler had something valuable to contribute to humanity in the form of a lesson that we can draw from for the rest of history.
Oh, I just thought of one. Never discount someone else's perspective out of hand.