Making Skis More Durable/Increasing Longevity

Recently I've had bad luck with my skis- two pairs delaminated and one had an edge rip out. Even though some of them were under warranty, shipping and remounting costs a wad of cash. I was wondering what you guys do to up the durability of your skis before something happens, or what you have done after a component has broken. I've heard of riveting to prevent delams and switching the foot on which each ski is used to prevent edge cracks, but there must be other things that you can do to up durability.