Digital Photography - Experiment With Settings
When they're not working on an assignment, professional photographers spend a lot of time testing. This could be testing a new lens to determine which aperture or focal length it performs best at; testing the ISO and white balance to see which options give the very best results; or even testing the dynamic range so you know the sensor's limitations.
You can do exactly the same with your DSLR or mirrorless camera, so you know precisely where its strengths and weaknesses lie. This isn't about looking for perfect shots - just experimenting with your kit to understand it better, or trying out new techniques that you can employ at a later date.