You know what they say about that ounce of prevention. If you ignore the advice and overlook home maintenance, the pound of cure can set back hundreds, if not thousands, of dollars.
Sooner or later, a neglected roof will leak. A furnace overworked from clogged air filters will need an expensive overhaul. And that leaky window will lead to dry rot in your house's framework and walls, necessitating a lot expensive structural and esthetic repairs.
Prevention, in the form of maintenance tackled throughout the year, is the best way to keep these common household ills at bay. When little things do go wrong - as they inevitably will - knowing how to take care of them quickly means that you'll spend less of your valuable time waiting for those repair people to make an expensive appearance.