Moving content from one site to another

[LeeAbrahamson]

I have a couple established, content rich sites with some content that I would like to move over to a new site.

My question is what steps I need to take to ensure that neither my older sites nor newer sites are penalized for duplicate content.

The purpose for moving the content is to add some depth to the new site for users, as well as possibly optimize it all for SEO.

There is a fair amount of content involved, about 50 posts and pages per site, so I'd like to know if the potential problem with duplicate content might be serious enough that I should think twice.

What do you recommend?

[TakeshiYoung]

If you are going to move content, include a canonical tag from the old content to the new content, and Google should be able to figure it out eventually.

[TommyTan]

I just want to add onto Takeshi's response.  Google's Webmaster Blog has all the answers you need on how the Canonical Tag works.

A canonical tag is basically a tag you enter in the HTML to tell Google Bots that you want a page A to be indexed and not page B to avoid duplicate content.

http://support.google.com/webmasters/bin/answer.py?hl=en&answer=139394