Don't put metal in a microwave. Don't mix bleach and ammonia. What are some other examples of life-saving tips that a potentially uninformed person wouldn't be aware of?
I myself didn't know that you weren't supposed to put metal in a microwave until I was 19. I just never knew it because no one told me and because I never put metal in a microwave before, so I never found out for myself (thankfully). When I was accidentally about to microwave a metal plate, I was questioned why the hell I would do that, and I said its because I didn't know because no one told me. They were surprised, because they thought this was supposed to be common knowledge.
Well, it can't be common knowledge if you aren't taught it in the first place. Looking back now, as someone who is about to live by himself, I was wondering what are some other "common knowledge" tips that everyone should know so that they can prevent life-threatening accidents.
Edit: Maybe I was a little too specific with the phrase "common knowledge". Like, I know not to put a candle next to curtains, because they would obviously catch on fire. But things like not mixing bleach with ammonia (which are in many cleaning products, apparently), a person would not know unless they were told or if they have some knowledge in chemistry.