10. Use the cheapest hosting provider you can find.
Preferably use a shared server that hosts hundreds of other sites, some of which are high-traffic porn sites. Don't check the list of recommended hosting providers.
9. Don't waste time with regular backups.
Maybe the hosting provider will help you out.
8. Don't waste time adjusting PHP and Joomla! settings for increased security.
Hey, the install was brain-dead easy. How bad could the rest be? Worry about those details only if there's a problem.
7. Use the same username and password for everything.