The best tip I can suggest is to hire the best agent out there. What we do looks easy to many, but believe me there is more to getting top dollar in the least amount of time, staying safe, legal and on track than most people can handle on their own.
When you hire a great agent, you really hire all the agents in your area. Your agent represents you, puts your needs first and will market the property to all the buyers and agents out there. The other agents will work for their clients, so be careful what you tell them. A good agent is a trained listener and will use whatever you tell them against you.
This is a huge transaction and a great agent brings value which will exceed their commission. A bad agent, or none at all will cost you more than just a commission.