Place towels, cotton etc ... out of your sight. Also you can place the
toilet paper in a small basket, and it will save you some space inside the
One entire wall turned into a bookshelf, is the best way
possible to gain space. Yes, you will need
a ladder to reach the top.
Small shelves like this ones, are very useful.
A great idea is to store the towels on a wine rack as in the picture.
If you have a tub and you don´t want to give it up, you can use the space
between it and the wall for some storage as in the picture.