These sites sometimes issue confusing disclaimers. NewsBuzzDaily, for example, writes on every page that it contains both "real shocking news" and "satire news," then adds, "Please note that articles written on this site are for entertainment and satirical purposes only."
One of the easier ways to spot suspect stories is if they're located on a news site with a strange domain name. Other untrustworthy sites will try to imitate a reputable, well-known website by incorporating it into its own URL; for example, using NBC as part of its URL: www.nbc-real-news.com.
When reading a story based on a poll, check to see who conducted the poll, the number of people surveyed, how they were selected and how the survey questions were phrased. If you have that info at hand, you should have a good idea as to the reliability of the story.