I sold FSBO this summer. I would definetly get an attorney lined up. I used someone who was part of the title company. He charged $500 to handle the transaction. For example, if a buyer brings you a contract, your attorney will review it and make sure that there arent any clauses in it that make it easy for the buyer to walk away.
A word of advice: if people call and say "can I bring my realator?" Or if you get calls from Realtors (you will!) asking if you are willing to pay a buyers agent...just say, "everything is negotiable" or "all strong offers considered."-- something vague. Because, really, you dont want to encourage ppl to bring their agents, but you don't want to discourage potentially strong buyers.
I got tons of annoying calls from R.E. agents who " have a pre-approved buyer who is very interested in your neighborhood" (yeah, right)! They are trying to get this listing, but you have to be nice to them, as who knows? -there is an off-chance that they are telling the truth and really DO have a buyer for you!!
I listed my house on Zillow (estimates on that site are way, way too low in the area I sold in), but ultimately, a neighborhood posted about my house on her FB feed/wall whatever its called, and that's how my buyer found me.