The only thing I buy now is products. Basically, I do what everyone else does, I wear a mask, I keep my distance, I disinfect my hands, I try not to move products if I don't buy them.
Although, I will say that many people do not do this in the store. These people wear a mask under their nose, in line trying to get as close to you as possible. Probably it seems to them that the queue will move faster.
And recently I was shocked by one situation. In the supermarket, the woman started coughing and took off her mask. I shouted at her «What are you doing ?», and she answered me « I'm uncomfortable coughing in a mask». So what to do with such people?