The phrase "do to" is often used to describe an action that is taken as a result of something else. However, there are many synonyms for this phrase that can be used to add variety to your writing. Some alternatives to "do to" include "respond to," "act on," "address," "tackle," "handle," "cope with," "deal with," and "manage." These alternatives can help you better express your thoughts and convey your ideas more effectively. Experimenting with different synonyms for "do to" can also help to improve your writing style and make your writing more engaging.