Do not want to be Indexed

Found several different ways in search to do this - but in some ways too many ways..

What is the best way to stop any search engine from indexing anything on your site? Is it:
<meta name="robots" content="noindex" />

Going to do this to a brand new site so do not need to worry about history showing up.


Thanks..

create a robot.txt file and add the directories or pages you don't want indexed. e.g.,

User-agent: *
Disallow: /thisdirectory
Disallow: /thispage.html

Edit:

I just noticed you said anything on your site so it would be:

User-agent: *
Disallow: /