It’s not all negative though. If you regret something, you can use it to change your ways: see the thing you regret as your rock bottom, and let it spur you on to become a better person. Lucy looks at how she can use shameful or annoying things from her past to change her future.
Lucy regrets volunteering at the school fete when her kids were younger, because now she’s committed to being the Hook a Duck Lady twice a year for the rest of her life. Maybe she could learn to say 'no' a bit more?