Do what I did (I'm still the talk of the local Ace store): Paint almost each wall a different wild color. Granted, most of my walls and my ceilings wood so that offsets a lot of the craziness but I ended up with:
Lime green in my loft/above my living area
Lime green in the basement bathroom
Robin's egg blue in the guest bed and bath (was being nice to guest)
Lemon yellow in the living area and kitchen
Purple in my bedroom
Pink in my bathroom
and I was boring and did the basement grey.
Thank goodness I have a small house or I'd be looking at the big box of Crayolas for ideas. It's an open floorplan so you can pretty much see every room but the basement from every other room so it is an explosion on the eyes.
My painter was shaking his head wondering WTF I was thinking but now, over a year later, he said he still talks to others about how much he likes it. He calls it the "Happy Color House"
With all the bright colored folk art I have, I call it the house decorated by someone with the mind of a 12 year old
My painter also explained to me that I'd never get a man to move in here with the MB painted pink, lol.