I rarely use filters in post processing (PP) preferring to recreate the original colors and lighting as needed. Between seeing potential in a subject and pressing the shutter I can’t remember ever thinking how it would look with a certain filter.
The task: Review the filters available in ones PP software. Play with them some if you’ve forgotten what the effect does. Shoot something with a specific filter in mind. I shot these mannequin legs with two filters in mind, intending to apply the filter only to the background.