Clark has long talked about TripAdvisor.com and how valuable it is for gleaning the collective wisdom from other travelers when you're planning a trip. There's also a site called Yelp.com that similarly culls the reflections of locals on what they know best -- their own neighborhoods. It's especially great for people who want to eat and play like a local when in unfamiliar territory.

The penny-pincher and his wife discovered Yelp during a trip to San Francisco, which happens to be the website's hometown. Whenever the couple wanted to dine out, they simple "Yelped" and got great suggestions on the top local restaurants.

If you want to use Yelp, be forewarned that you'll encounter a lot of foul language in the user postings. Yelp tends to attract younger, hipper posters who favor 4-letter words.

The New York Times reports there are 4 million reviews on Yelp from all around the country. When Clark was in Portland before a flight, he got a bad case of bagelitis and wanted to find the best local bagel shop. Yelp directed him to an unassuming, counter-culture kind of place that he normally wouldn't frequent. He was rewarded with the best bagel he's had outside of New York City.

The Times article also reports that food snobs and high-end chefs are up in arms about Yelp. It turns out they resent ordinary people reviewing their restaurants!