Take action:
Lock all potentially poisonous substances out of reach and out of sight of your child; keep kettles and similar appliances (including cords) far back on working surfaces, so that they cannot be pulled down; store the blades of food processors and similar devices separately and out of reach; pack the iron out of reach after use - even if it has cooled down, a child can be hurt if the iron falls on top of him; store plastic bags out of reach, and teach children never to put bags over their heads; certain items stored in a fridge can be dangerous to children (e.g. alcohol, medicine), so lock your fridge; always use the back plates on a stove and turn pan handles away from the front of the stove.
Read the comprehensive guide to childproofing your kitchen here.