I needed to use my small coat closet more efficiently (observe the disaster in the before picture!), so I installed built-in shelves along a side wall for all our board games. Not a plan really, but just a simple solution. Measure the height you want your shelves to be, install a 1X3 at that height on either side wall, making sure they are level and secured to studs or anchored (Mine are 1 foot apart up to 5 feet). Then install plywood or solid wood shelves across the supports. Screw in to secure and you've got functional, inexpensive shelving, built to fit your unique space.
Estimated Cost
Scraps or the cost of 1 sheet plywood and 1 1X3 or 1X4.
Estimated Time Investment
An Hour or Two (0-2 Hours)
Finish Used
It's all just bare wood.
Recommended Skill Level
Beginner