Any cupboard which has cleaning supplies in it should have a childproof latch, regardless of whether small children live in the house or not. Household chemicals are dangerous if ingested in large amounts. Medications should be kept out of reach and out of sight. Outlet covers, most stores carry some brand of covers to go over electrical outlets, to prevent a curious toddler sticking an object in one. Cord guard, these are used to cover your cords that are in the outlets to prevent a small child from pulling the cord out of the socket and then trying to plug it back in.
Toddlers are at just the right height to hit their head on the corners of counters and sharp tables.
A child running into the front room may trip and fall and hit their head on the corner of the coffee table. Little hands on little people, standing on tiptoes can reach the stove burners. You can purchase a shield to attach to your stove front that is about 4-5 inches high to prevent curious fingers from reaching the burners. Always keep pot handles turned inward when cooking to avoid a small child pulling a pan of hot food down on him or herself. If you are shopping for a new stove, make sure to buy one that has the knobs on the top rather than the front.