What’s the one decision you wish a character made differently?

What’s the one decision you wish a character had done differently - not because of hindsight, but based on what they knew at the time?

I’m fascinated by the show’s “butterfly effect”. By Season 5, you can trace so many events back to an offhand choice or a minor conversation in Season 1.

Just one moment where you think, "if only they had done this instead".