You should always be aware of furniture items or ornaments with unstable bases that could be easily pulled over. Babies commencing the toddler stage will use objects to pull themselves up. Typical items are coat stands, planter tubs and fire tools. Isolate any items that could injure a toddler if they should topple.
Most toddlers at some stage will be prone to climbing and therefore shelving can be particularly hazardous. If shelving is not stable consider bracketing it to the wall. If your toddler shows a tendency to climb, remove toys or any attractions from high shelves.