What other word can you use instead of you?

Answer 1

You means the one or ones being addressed. "You should brush your teeth so your teeth don't rot out of your head."when you're directing the person to whom you are speaking to brush their teeth. To eliminate the pronoun "You" in this case you could use the individual or group's name(s) as in "Bob should brush his teeth so his teeth don't rot out of his head."

One is an indefinitely specified individual. "One should brush one's teeth so one's teeth don't rot out of one's head." when you are speaking about people in general. This form is considered by many listeners to be a bit archaic, formal, or awkward. (Wow, that was a lot of "ones.")

If you find yourself saying "you" often in your writing, try restructuring the sentences to eliminate the need for a pronouns. "To prevent tooth decay, teeth should be brushed at least once per day."