I haven't sold a house for ages, so feel free to ignore me, but I would say to start by thinking of who is likely to buy yours, and try to show that it would be a suitable place for them to live.
Only you (with the help of the Estate Agent) will know who it will appeal to (people like you were when you bought it, probably) but as an example, if it is a family house, show that there is somewhere to watch TV, and somewhere else to listen to music or read without being disturbed. If you can show an 'office' space, whether it is a box room, or just an alcove somewhere that will be a big help nowadays. It sounds as though the house is quite large (as you have five large bits of furniture leaving), so you could show that it is suitable for entertaining friends - that sort of thing.
Be aware of restaurants, cafes, theatres etc, whether you use them yourself or not, and be able to talk about them if asked.
Get bus and train timetables, so if people ask about accessibility you can answer, and look up local schools. If their OFSTED results are good, print them off or make a note of the url to tell buyers with children (if the results aren't great, just ignore it and let them look it up).
I don't know what the market is like where you are, or what deals are available with EAs, but the best deals are 'no sale, no fee' ones, if you can get them. That way, if the house sits on the market for too long you can switch without fees, but watch for tie-in clauses such as those who say that if it sells within 6 months you have to pay them as well as the selling agent.
That's all I can think of for now, but good luck, and keep posting so we can chip in with other ideas as we have them.