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
6. Waste time on faucets (we all did)
7. Collect dust and pay high fees on it
8. Leave coins in an exchange
9. Trust the wrong people and get scammed
10. Panic at a price correction
I laughed on the number 6 because it's trully right. Almost people that still new about bitcoin always feel that number 6 and even do it full time in 1 week. I also have one, people that still new about bitcoin always think they can earn bitcoin easily but in reality it's not easy as you think and you need to work or do something to earn bitcoin.