Bathrooms are often some of the smallest, busiest and wettest rooms in your home. So decorating them isn't as obvious as other rooms. You can't really have much furniture, unless you one of those sprawling large bathroom that size of a master bedroom. In which case I envy you and by all means, furnish away! However for the rest of us and our tiny bathrooms, there are only a few areas where we can decorate, and which would make a big difference and be very affordable to do.
1) A set of matching prints for the walls, if you're walls aren't tiled up to the ceiling.
2) Window ledges.
A few ornaments on the fixed glass side of the window. That way you can still open and close your window without any trouble. Due to the narrowness of the window ledge, just a few small things to make the window more interesting, because you can't really focus too much on the view if you want privacy.
3) Around your bath tub.
Now this depends on how often you use your bathtub. If you use it quite often or once or month or so, this might not be for you. However if you're like me and you use the bath tub once a year, this is space you can decorate. This space is usually really narrow, so what I almost stick with doing is arranging a line up of relatively cheap perfume bottles of different shapes and sizes, ones I actually use. Or you can do a few little decoration items.
Maybe a little bath caddy you can dress up over your tub, could look nice.
4) The corner or middle of a vanity.
A little flower arrangement or orchid works well. I also like using glass fish figures, to run with that bathroom, showering, water theme of the room. It's probably the only room in the house where I can use these, so yep, they're on display.
5) You can also use decorative faucets, taps and benches, though these can be expensive.
Now if you're one of those fortunately people and you have three or so meters of empty space between your bathtub, shower, and vanity. You could also set up a cosmetic/powdered table/station, or put a little occasional table which may hold magazines or news papers - a little bit of reading material to not rush the business of using the toilet. Something like that.
Well I hope this helps you make your bathrooms and toilet areas more interesting. Happy decorating.