Overthinking disguises itself as preparation, but in reality, it is fear of making an imperfect decision. True problem-solving is linear and results in an outward action; rumination is circular and breeds stagnation.
Never solve complex multi-variable problems inside your working memory. The human brain holds roughly 4 to 7 working chunks simultaneously. Transfer every looping thought onto paper. Once visualized externally, problems shrink to their actual physical dimensions.
Implement the 70% information rule: If you possess 70% of the relevant data and a clear intent, commit to the decision. The feedback gained from execution will always surpass the theoretical accuracy of prolonged deliberation.