[Mrs. Robinson]

If the carpet you have in the bedroom is in good condition, leave it.
Otherwise, replace it with a similar color which I assume matches what is in your other bedrooms.
A million different floorings in a house is a no-no.

If the house needs painting inside, do-it.

Remove everything personal.
That includes photos, religious items (including those little white crosses on your lawn, if you have one), and anything on your refrigerator!
Only leave necessary items on your counter tops in the kitchen and baths.

If you have pets, be aware you may have pet odors in the house.
Ask a neighbor to come in and give it the sniff test.
If you have any odors, shampoo all your carpets, wash all the pet beds and blankets regularly and remember to remove or confine pets when you show the house.

Make sure your landscaping is maintained and plant some fall annuals for color.
Pressure clean your driveway and walkway if it needs it. Curb appeal is important.

Make sure the inside of your washer is clean.
If you've already packed some boxes, if it's more than a few, store them for the time being.
Turn on all your lights and lamps when showing your house.
Bake cookies when you know the house is being shown or simmer cinnamon sticks on your range; those smells are inviting.

Good luck!