What is the best way to prevent rust on an Audi?

I recently bought an Audi and noticed some rust starting to form on the body. It's still under warranty, but I want to prevent it from getting worse. What should I do?

Regularly wash and wax your Audi to protect the paint from rust-causing elements.

Use a rust converter on any existing rust spots to stop it from spreading.

Park your Audi in a garage or covered area to protect it from rain, snow, and other harsh weather.