Floating shelves
Floating shelves screw into walls without additional supports underneath. They look sleek and modern but tend to have lower weight limits than shelves with supports underneath.
Floor-length shelves
Floor-length shelves look like bookcases but are attached to the wall for stability. These shelves are good for rooms that still have some floor space but need to maximize vertical storage. They can typically store more weight on the lower shelves.
Racks
Racks are for vertical or horizontal storage of items that are all the same shape and size. DVD racks and coat racks are the most common examples.
Cabinets
Cabinets are an excellent option for storing small items like medicines and keys. Some cabinets are lockable for security.