If, upon your return, the ice cubes look like they melted and refroze, it'll alert you that a power failure occurred and some of your frozen goods may be spoiled. Try gluing golf tees to the bottom of the drawer, they make excellent spool holders. Just put them in a plastic bag with a fresh slice of bread. It'll soften them. Squirt lemon juice on windowsills and the bottom of doors.
Ants hate it.
Set it well away from the fruit. If you drop a raw egg on the floor, sprinkle salt on it and it will wipe up easily. To quickly dry fingernail polish, dip your nails in ice water. The polish will harden much faster. If you have trouble with a zipper, rub some liquid soap up and down over it.