I know this one is over the top in terms of PP but it was for a university project and I needed something that stood out when printed on a presentation board. It looked really good in the end.
A polarizer will actually get you deeper more saturated colours. To be honest, saturated colours are not an issue I've ever had. I suppose you can take some of it out in post processing.
This little guy was trying to eat some algae which was brought to the shore but unfortunately the waves kept hitting him, he didn't know how to fly yet.