*Other acceptable forms of torture include:

Poking out your own eyeballs.
Cutting your Achilles' tendon with rusty gardening clippers.
Hiring someone to repeatedly punch you in the stomach.
Stepping into an iron maiden.
Listening to Iron Maiden.

Or you could just dwell on mistakes.

If I sat around and thought about the things I could've done differently and what might have been if I'd done so, I would lose my mind. All I can do is learn from mistakes and change my behavior in the future. What's done is done. The past is the past. No way to change it so I move on, live life, appreciate where I am. Every step I took was crucial in arriving exactly here.