The things you do this summer may give you memories you'll cherish for life. Unfortunately, a moment's carelessness can have the opposite effect. While you can't eliminate all risk, you can certainly reduce the odds of a potentially tragic accident. What's more, the measures that save the most lives are also some of the simplest ' wearing a bike helmet, for instance, or putting on a life jacket. When safety automatically comes first, you can really start to have fun.