1. Your sunglasses. Yes! I was shocked, too! But you'd be surprised by how much bacteria can grow on your sunglasses and your regular prescription glasses. Please start thinking twice about tossing your sunglasses in your bag or on top of any restaurant table. Fortunately, you can debug your shades by washing them with antibacterial hand soap and water every few days.
2. Your cell phone. Your cell phone can be "Technological petri dishes". Phones pick up more bacteria than almost anything else, it is recommended to clean yours with an antibacterial wipe, like one from Lysol, before each use (though once a day may be more realistic).
3. Your makeup brushes. They're "reservoirs for bacteria". To disinfect them, spritz them with an antibacterial cleanser like once a week. Your skin will thank you.