You might think that buying and selling a home works the same way it did when the first real estate agent stuck a for-sale sign in a newly trimmed lawn. In fact, the process of buying or selling a home is in the middle of a massive shift. Gone are the days when real estate agents relied mostly on yard signs, open houses, and a few postcards and door-knocks to sell a home. Driven by market forces and advances in technology, today’s successful agents have transformed themselves into a combination of salesperson, educator, and social media master.