This question was asked in the WordPress forum here. Since nobody had answered Michael at press time, I thought it might be helpful to find the answer and publish it here.
Option 1) Use robots.txt to prohibit search engines form indexing a page. Simply add this to your robots.txt file. If you don’t have a robots.txt file, simply create one in your go-to text editor.
These two lines will a) let search engines know this rule applies to all robots and b) tell them they cannot index the page located at “category/page-title”.
Option 2) Use this handy plugin. The Ultimate Noindex Nofollow Plugin by Jonathan Kemp. With this plugin you can choose pages that the plugin will identifying as non-indexable in the robots.txt file. There are many other options with this plugin including adding the rel=”nofollow” tag to various places in your WordPress code.
Option 3) Use a meta tag to order search engines to not index a particular page. The meta tag looks like this:
<META NAME=”ROBOTS” CONTENT=”NOINDEX, NOFOLLOW”>