Key tips to selling are know the costs involved and receive them in writing. Importantly know what you are getting not only for the paid marketing but the included items as well as it may not always reflect what is being said.
Receive a full market analysis showing trends, time lines, buyer demand, with full market knowledge/information.
Maximise your return through great presentation. Presentation is the key and can return a very healthy sum of money without having to break the bank. Remember less is best.
Most important is to choose the right agent. There is a big difference between a good agent and a great agent, sometimes in the vicinity of 20k to 100k.