Here's a list of things that really need to be done before the houseconcert:

Clean bedrooms well; vacuum them, too
Finish laundry
Clean laundry room
Plant lavender
Vacuum bedrooms
Clean out animals cages
Sweep garage
Scrub porch
Scrub garage door
Finish cleaning windows
Move television out of Big Room
Pick up any unwanted items in yard, including pool
Get peanut butter, soap and drinks from Nature's
Clean cupboard fronts
Clean silverware drawer
Clean microwave
Scrub sinks
Vacuum couch
Bathe kids
Check cabin
Get haircuts?
Straighten fruit cellar
Straighten Pop's area
Straighten basement laundry room
Make sure ALL rooms are presentable for guests
Buy fly spray
Kill flies in the house
Take down fly strips
Vacuum under EVERYTHING
Make sure all surfaces are dusted properly, including picture frames and bookshelves