If you want to do something spontaneous, get yourself 20 wonderful absolutely gorgeous prints, geometrics, solids, textures that all somehow go together. Choose a color scheme you would not ordinarily use. Make a complex Turning 20 type quilt and just go for it. I do this once each year and I have to say that I love these quilts. One year the color was orange and this year it was a bright poison green or chartruese. It has flowers, dragonflies, birds, geometrics in that green, pink, yellow, white, etc.
It has helped to widen my horizons.