Not only is using the right kind of gear necessary to avert the possibility of an injury, but you need to make sure that you have the right protective gear. Many work environments, sports, and household tasks require that you wear protective gear to protect yourself from preventable injuries.
If your workplace requires you to wear safety gear, then make sure to use it at all times. This includes hard hats, safety glasses, protective gloves, and face shields. This could also apply to wearing earplugs to avoid any damage to your hearing.
When engaging in certain sports you should wear the appropriate protective gear. Of course, you may think that helmets don't look "cool", however, they can protect your head from serious injury if you fall off your skateboard, bike, climbing wall, etc. The same is true if you enjoy cycling. A high visibility jacket, even in the daytime, helps drivers notice you quickly and can prevent you from being involved in a serious accident.
Even when carrying out simple household chores, protective rubber gloves can protect your hands from injuries caused by chemicals or solvents.