If you don't have a fireplace, but still want to hang stockings and decorate a mantel, you can craft one out of cardboard! Using cardboard display boards (ones students use for science projects), you can build a realistic (and lightweight) fireplace.
30 Brilliant Bathroom Organization and Storage DIY Solutions
Plant holders make great hair styling supply holders. Instead of hanging plants in them, you just mount them to the wall and put your blow dryer, curling iron and other hair supplies inside 30 Brilliant Bathroom Organization and Storage DIY Solutions
This but with Wine Corks--- Beer Cap Collector Shadow Box from Craft Beer Hound "Perfect gift for the beer lover in your life. It's a great quality piece that adds lots of personality to any room." -Jennifer W.
This is a perfect combo of my two favorite ideas for that space under the stairs leading to the basement. A reading nook AND book storage and shelves . assuming that there is enough space for this there.