Here are some synonyms for "prudent":
* Wise
* Judicious
* Discreet
* Thoughtful
* Cautious
* Sensible
* Farsighted
Examples:
* "It's prudent to save some money for emergencies."
* "She made a prudent decision to invest in a diversified portfolio."
* "He was a prudent leader who always considered the long-term consequences of his actions."
Essentially, a prudent person acts in a way that minimizes risk and maximizes chances of a good outcome.