In one of the bigger acquisitions of 2014, Zillow purchased Trulia for $3.5 billion. The two companies created the market for online real estate listings and attract a combined total of well over 100 million visitors to their sites every month. Before these two firms were founded, there was no central depository for real estate data that the public could access, a dynamic that has made it difficult for the Average Joe to understand how the real estate market really works.

Now that the two companies are to become one, Zillow is an even more formidable force in the real estate industry, as well as a vital source for data on the housing market. On January 27th, the firm’s CEO, Spencer Rascoff, and Chief Economist, Stan Humphries, will publish The New Rules of Real Estate, a compendium of knowledge gleaned from the 3.2 terabytes of data processed by Zillow computers each day. The volume is loaded with secrets the average homebuyer or seller can benefit from, but here are the 13 we found most useful, or just plain entertaining.