If you have a sloped ceiling or need to make an attic space liveable, simply arrange the furniture in a way that makes the most sense. Here you see the dresser is against the shorter wall which is smart because you don’t need much clearance above a dresser. Turning cubed bookshelves on the side or making built ins on the shorter walls are also smart solutions without compromising storage. Floating shelves over file cabinets can create long desk space. Instead of a mirror over the dresser, they opted for a tall one that’s hung against the full sized wall.
When you’re working with a small area, buy individual furniture pieces instead of sets. Buying sets may be a better deal but they are harder to squeeze in rooms and when you have furniture too large, the space ends up feeling smaller. Buying tables on legs allows for floor pillows, small ottomans and poufs to tuck under easily. They can be used for additional seating. Tulip tables and others made pedestal style are great in smaller areas. If you have one sofa, consider buying one or two chairs instead of loveseats as it’s easier to move around a chair in an awkward layout. Use dressers for tv stands which can hide unsightly cords and dvds etc. Not convinced about a dresser? See examples here.