[exe34]

this answer might seem off topic, but it really isn't. your problem isn't really architecture here - it's getting stuck in an unproductive mental rut. do you agree?

if you do agree, then the solution is something along the line of avoiding the rut in the first place:

1. strengthen your resolve to think things through before committing to them - is it worth the risk?

2. get a second opinion - talk to your social network (in person preferably), about your idea, your concerns about it, and ask them to check up on you a quarter of the way through - if it seems like it's not a good idea, it's often easier for others to spot it in our behaviour.

for the first one, you could consider things like mindfulness meditation/reading Stoic literature - these help you build the mental skills to step back and ask questions instead of being dragged around by what is ultimately an emotional excursion.