Remove everything you sell at your counter from the counter and replace it with completely different products that are usually not at your counter.
This idea is designed to disrupt you and your customers.
Track the results for a week and see how they compare to what you usually sell from the counter.
If you keep doing what is usual you will get the usual result. Disruption will always inform future decisions.
I may try this new series for the next few weeks and see how it goes. I’ll post a different challenge each week to disrupt the traditional newsagency.