What else in your house should get sharpened?

There is things that should be sharpened that people dont think about. When you use untinsels that are sharp they cut easily. What are these items?
Household Items
1.Blender blades
2.Potato peeler
3.Cheese grader
4.Fingernail clippers
5.Cuticale remover tool
6.Cuticale pusher tool