3) Change your tub and toilet. New tubs are designed to fit into smaller spaces. Kohler has several small sized alcove tubs that work well. They even have a curved front tub that doesn't use a large footprint, but feels expansive while you're in it. A smaller, one-piece toilet may also have height and width, and as a bonus, you'll get a low flush model that saves water.
4) Swap your widespread faucet for a single hole to open the space on your small vanity or pedestal sink.
5) Use sliding doors instead of shower curtains to open your space. Sliding doors don't require space for door clearance, so can be better than a door that swings open.
6) Downsize the vanity. Newer vanities are smaller yet maximize the interior storage space with drawers and pull outs. Opt for a pedestal or wall-mounted sink and attain space savings. Wall mounted shelving - even using interior wall depth - will add back storage but feel less weighty.