You missed the most important:
#1 leave your money on an exchanger
Maybe the point that is at 5 is not to leave money on the exchanger.
1. Do not remember electronic wallet password
2. Do not back up your wallet
3. Do not research new services
4. Buy and sell based on feelings
5. Leave your money in the electronic money floor
Ah you forget the worst thing a beginner does, panic selling lol. They quickly sold just because the price started to fall just a little. I hope this thread can be a guide for some new beginners who join the forum.