The best way to promote your site and get lots of traffic is by creating original and value added content for your users. You may however, take snippets from other sites citing the original source but the entire article should not contain just stitched content. As an example, Matt asks you to review Wikipedia which cites so many sources for every article but maintains the originality for each one of them. This is the reason Wikipedia ranks so high on the search results.
Here is the video from Matt Cutts explaining about the trouble you can have by having stitched and unoriginal content:
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