What are some the more idiotic and stupid mistakes that you know you shouldn't have made but did anyway. Yes this includes other none gambling stuff like sending btc to the wrong address. I'm interested to find out the stupid things other people do. 
The worst mistake that i experience in gambling that until now will always pop up in my mind is when i put all my money in one bet in cockfighting and i loss with no even a one penny save for fare in cab so in order to going home i borrow a money to my friends,while my stomach is tremble of hungry.