We cleared almost everything off the kitchen surfaces, except for magimix food mixer, toaster and fruit bowl. Tea towel got put in a cupboard, kitchen bin got put in the garden!
Decent towels in the bathrooms, hung or folded really neatly. Get rid of any clutter from bathroom - no bottles of shampoo etc on show, unless a couple of nice fancy ones.
A vase or two of flowers put somewhere noticeable, but not centre stage.
We put all toys in the shed, boot of car, cupboards, anywhere we could really! Other than a very neat and tidy child's bedroom, we pretty much erased any trace of our 3 year old! Appreciate that won't be on everyone's agenda though.
If you have a shoe rack, and it can't all be dumped in a cupboard somewhere, make sure there are only a few pairs of shoes on it so it's not over-crowded. Same with coat hooks.