Saturation can be a touchy subject with some photographers who think that increasing it verges on sin. If you look at almost any film made today, however, you will probably notice how the editors have pushed saturation. I'm not saying overuse it, but I have found increasing saturation is another means of portraying a pictorialist style image.
Okay, so maybe these come close to overdoing saturation, but notice how it shifts it out of the range of photograph and into the possibility of being something else altogether.
Fall leaves with their intense colors make good subjects for this method.