what is the best idea to make mirror for mysql database

Dear Sirs, I have a web site which is keeping user data in mysql. I am afraiding that to collapse of existing server without my control. I want to use another server to keep in standby and I want to set new server DNS as a third and forth server. As far as I know if primary and secondary server will not work, internic divert to third and forth server. But I need to keep new server mysql database refreshed. Where can I find best idea to make such a mirror with my existing server and new server? Best Regards