It's easy to get caught up in the moment when buying your first house but there are some critical mistakes you need to avoid. First, don't buy based on emotion or on the house alone. Make sure to research the neighborhood, the commute to work, and other factors before committing to a home purchase. It's also important to apply for a mortgage before buying a home and talking to multiple lenders and mortgage brokers. Most importantly, stay within your price range and don't buy more house than you can afford.