There are so many questions you wish you had answers to. Who serves up the best dim sum in the city? Where can you score a designer dress at a discount? And where, oh where, do the cool kids go after 2 a.m.? There are many people pondering the same questions. And, of course, someone out there has the answers. Welcome to Yelp, an online community that’s one part CitySearch, one part Epinions, with a dose of Friendster thrown in for good measure. Here’s how it works: You create a personal profile, then write reviews of your experiences at places in San Francisco and beyond (those you love and hate), or just browse through the thousands of irreverent reviews — and reviewers — already on the site. Invite your friends to do the same (the more people involved, the more suggestions for everyone). Some members are already achieving cult-like status for their writing chops — especially Stellah D, Kevin S, Amme H, Kimberly T, and Maria F! And with the somewhat enigmatic Yelp Elite Squad causing quite a stir both on and off the site, you’ll be hooked in no time. The solutions to all of life’s problems. Who knew it could be so easy? Answers available at Yelp.