Paint your small spaces (for example powder rooms) in dark, rich, yummy colors, it's unexpected and beautiful!
I not only like dark paint, I like to soften and add more interest to my clients dark walls by doing some kind of faux work, either by changing the wall texture with venetian plaster or fauxing with a goldy/silvery finish, for added luxury.
Powder rooms are fun because they are contained to a small room, so if budget is an issue, you can choose higher priced finishes in there and get a lot of credit for it, especially for it's higher visibility with guests.
I have a Squidoo page (don't know what that is? Well just click on my link and see), where I share lots of bathroom tips. Check it out....Bathrooms!