Respect the power. Make sure everyone in your home understands how to be safe with electricity.
Install safety switches on all circuits in your home - they are your insurance against electric shock and are designed to prevent injury or death.
Even if you think you know what you're doing, never attempt your own electrical work. It is dangerous, illegal and can be fatal.
Stay clear of powerlines around your home. You don't have to make direct contact with a powerline for it to kill you. Electricity can jump from powerlines to you and your tools, and the impact can be instant and lethal.