Definitely a bible ! I bought myself a copy off eBay when I went off to uni in 2011 as I knew I wouldn't survive without it
Both my stupidest things I can think of were things I was told to do by someone else, and was too dim / shy to refuse.
1- aged about 10, my best friend and I climbed out of her bedroom window onto the (old, glass) conservatory flat roof. Her mum didn't see, but her little sister tattled and both our mums were livid. The roof broke a few years later in a storm, we were very lucky not to fall through.
2- I worked late evenings in a supermarket in first year at uni, and one night about 21:30 this older woman who smelled of alcohol came in, did her shopping, and asked for someone to carry it home for her - she 'only lives round the corner'. My supervisor told me to take it for her !! We got to the building (a good 5+ minutes away) and I made to hand it over and leave, but she said she needed me to carry it up the stairs to her flat. Again, I tried to leave it at the door, but no I had to take it in and put it in the kitchen. Thankfully the kitchen was right by the front door, as I kept my foot in the doorway, lobbed the shopping onto the kitchen side, refused her offer of a cup of tea, and legged it. I don't think I've ever been so scared in my life !! I then had to find my way back to the shop in the dark, down several narrow twisty streets. I told my (young, female) department manager next time I saw her and she was horrified, ripped the (middle aged, male) supervisor a new one and made it clear that nobody was to be sent on such an errand ever again.