Renovating your home can increase its resale value. But don't expect a dollar-for-dollar return. Some upgrades (an extra bathroom, for example) pay off; some (like swimming pools) don't pay off at all. If you want fine marble in the foyer, spend away. But don't count on buyers being willing to pay as much for it as you did.
When you take a vacation, don’t forget to give your appliances a rest too. Turn off and unplug everything you can, set your water heater to the lowest setting and shut off the water supply to the dishwasher and washing machine.