Here are some tips for small bathroom:
Place shelves in your bathroom where you can place your unused towel, soaps and other bathroom essentials. This will help in organizing your bathroom necessities.
Placing the sink into corner will save some space to your small bathroom.
If you wanted a big tub to relaxed, make sure to save space to place your tab.
Placing towel racks on the wall are both convenient and save on wall space.