I used glue, 1-1/4-inch brad nails and countersunk 1-5/8-inch screws to build ... use a wall anchor for extra grip into the drywall. That depends on the type of shelf. Prefabricated cubbies ...

you can add DIY drawers, pull-out shelves, and cabinets. All you need are 2-by-4 supports between the spanners holding the ...