Clean the windows inside and out.
Make sure the front garden/path or general approach to the house is clear and welcoming (leaves swept away, no dead plants in pots, wash down front door if needed)
Clear any piles of paperwork, letters etc (if you are anything like us you'll have a pile in each room!)
LOL about the cheese and checking nappies! At the ILs over Xmas we had an Epoisse cheese so I can totally relate to that . When we bought it in Tesco the young lad on the checkout even asked us if we wanted to get another one or was it supposed to smell like !