Supervision is key, of course. It’s cheaper than ever to get nanny cams to help you keep an eye on the kids even as you do chores around the house, and they’re worth the investment. It also helps to limit which areas of the house kids can access unsupervised: your kitchen, bathrooms, and utility closets should either be kept closed or have childproof gates. Basically, you want to keep them out of any room with sharp tools or cleaning products.
For outdoor play, you’ll want to make sure there are as few tripping and slipping hazards on a kid’s path as possible. Pools, ponds, and other water features should be covered for safety — pond covers can be found online, as this website shows.
But most of all, you should find yourself a childproofing checklist and work through it item by item. It’s shocking just how many things in a typical household can hurt a kid, and if you try to rely only on gut instinct, you’ll miss a thing or two.