May be a bit controversial but don't neutralise it too much. Sometimes it can end up making the house feel too blah and bland, therefore making the asking price seem overpriced for what it is.
Keep it tidy, clean and get rid of any clutter. Clean light switches, skirting boards and light fittings.
Then look at what you can do to add a bit of magic in each room. Fresh flowers, throws, a lit fire if you have one and some warm white plain fairy lights can cosy up your rooms easily.
Tidy up your garden and pretty it up with pots of herbs and flowers. Paint your front door and hang a cute seasonal wreath on the door.
Finally with viewings, make sure rooms have been aired, windows are clean and the rooms are a nice temperature. I was selling in winter and an hour before viewings did a stove top room scent (Pinterest has some good ideas), everyone commented that the house felt cosy and smelled lovely.
Asking price offer on 3rd viewing, sold in a week.