I always hated all the wasted space under stairs.especially like the open shelves & the bed (great for a guest "room" spot under stairs in a finished basement) & the.well guess I really like them all! Wish I had stairs!
Use drawer slides; mount the drawer on the wall; attach the shell to the slides, so it pulls out. Shifty Desk / Hallway Stand by Daniel Schofield This is such a great storage idea! It can be a shelf and a drawer.
How To Organize Your Bathroom to Get It Into Tip-Top Shape
Store blankets or .Possibly add storage to sofa table behind couch. Instead of lid opening up to hit the wall, I would have it up up from left to right or have a centerfold where it opens left/right & right/left at the same time