I like this article showing 6 first-time homebuyer mistakes and tips to avoid them.  

Its certainly not all-inclusive.  But basically when you work with a Realtor you are getting someone that is a coach, and can guide you to making the right and best decisions for your situation.  Its another one of those "you don't know what you don't know" kind of things.  Talk to us if you are thinking of buying any real estate this year. It costs NOTHING to have a Buyers Agent, and we can save you a ton of time and effort.  We will be your partner from the first searches to the closing.