There are practical things you can do, as well as esoteric.
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Make sure the spaces in the rooms are clear and easy to walk through. There's nothing like furniture in an odd place for messing up your plans for a sale
Make sure all the curtains / blinds are open and that there's plenty of light. Put the lights on if you need to but don't have lots of lamps about the place because they give the suggestion that the house is dark and dingy (because you need lots of extra lights)
If possible (and if you have them) don't have the kids around when people are coming to view. Nothing wrong with kids. It's just they have an annoying habit of "telling it like it is" when you least expect it, at least if mine are anything to go by
Don't have your more "off the wall" books or paraphernalia on plain view. People are people and a lot of them will be put off by Bucklands Big Blue Book or tarot cards left lying around. Candles are fine but not too many
Get the agent to arrange an open day. This is a day when they advertise your house as having an open day and arrange for viewers to come round in advance. You go out and they show the house for you. That's how we sold ours.
Make sure the price of your property is realistic and you have contingency for negotiation whilst still being able to cover what you need. The average price of houses in our area when we sold was £275k. Since ours needed work, we put it on the market for £240k, knowing that we had to make £220k to buy what we wanted. We got £225k
Finally, if you have too much stuff, put it in storage. There's nothing quite like having to rent a storage locker to really show you what you do and don't need
Hope that helps. Good luck with it all. And on the plus side, check your contract with your agent. You might find that you don't have to pay them, or at least have to pay them less, now the house has been on the market this long.
