To keep personal information secure, one must be intelligent in several ways. Always leave home with family when going to the bank, be wary of strangers, and do not share PINs with friends to prevent betrayal. When using ATMs, ask bank staff for help instead of entering PINs in public. Also, never use obvious numbers like birthdays as PINs to prevent theft. Finally, maintain separate email accounts for work and personal use to protect against identity theft. Being intelligent about personal security is key to keeping information safe.