When it comes to giving advice, there are many ways to convey the same idea without using the exact same phrase every time. Some synonyms for "someone would be well advised to do something" include "it is advisable for someone to do something," "it is recommended that someone do something," and "it is wise for someone to do something." These phrases all indicate that the speaker believes the action in question is a good idea and that the listener should seriously consider following through. Other synonyms may include "it is prudent for someone to do something" or "it is in someone's best interest to do something." Ultimately, the goal is to convey the same message in a slightly different way to keep the conversation interesting and engaging.