What you will need:
Masking tape
Rust-Oleum specialty chalk board latex paint
(Available in a large can or spray can)
Stencil (optional)
Mask off any hard clean surface and spray or paint one coat. Let dry. Spray or paint a second layer. Let dry. You can stop here or paint a third layer.
....ideas....
Paint a mirror using stencils for a decorative touch.
Paint labels on glass jars for better organization.