Paint or power wash house and replace any damaged screens or windows. Make sure sidewalks and decks are kept clear. Get rid of everything in the garage you don't want to move. Keep it neat. Touch up any chipped or soiled paint.
Light colors are best.
Put away any extra clutter - especially in children's room. Kitchen - NO dirty dishes, clean counter tops and mop floors. Bathroom - Clean tile and replace any loose grout. No dripping faucets. Make your windows sparkle.