Reading nook

With some shelves and some nicely fitted comfortable furnishings, you could turn your small spare room into a secretive reading nook. Shut the door and lock yourself away from the world to spend time with your favourite characters in blissful silence.
If you have a large window in your spare room, add a window seat for true reading luxury.
For the best reading nook possible you can even conceal the door into the room, making you feel like you have a magical secret. Because everyone needs a secret door.
Meditation/yoga room

If reading isn’t your thing but you still love to relax, you could turn your spare room into a yoga or meditation room. Paint it in neutral relaxing colours, add a plain wood floor. Make it uncluttered, but calming. Maybe even include some electric essential oil vaporisers to help you get into the right meditative mental state. Yet another way to turn wasted space into a comforting retreat from the stress of the world.
Make sure you read up on the 10 most common flooring installation mistakes.
Craft room

Plenty of people in the world have rediscovered the joy and satisfaction that comes from making things with your own hands. Maybe you’ve taken up knitting or crochet, or learned woodworking? Maybe you love making your own clothes by hand with only your trusty sewing machine by your side? Maybe you paint? Whatever it is, you could turn your spare room into a room dedicated to your craft. Imagine, drawers and shelves full of your materials, and a sturdy, attractive table for you to work out. Your pattern books or schematics are all within easy reach – and you have an internet connection, too, to look things up if you find something you can’t do.