Nicely fold purchased items before putting them in a bag!!!!!
The amount of times my items have been carelessly folded, rolled and sometimes literally just stuffed in a bag is ridiculous. They look like rags when you take them out!!!!
More recently I have awkwardly said "sorry do you mind if I just fold that top properly, just to prevent it becoming creased" and am met with a response to suggest I am being unreasonable!!
I wonder if shops train their staff in the art if folding :)