My friend is a manager for a large convenience store chain. Here are some suggestions based on things she complains about.
One transaction per customer. Oh you stood in line staring at the lottery tickets, and now you want to purchase them after your first transaction is completed? Too bad. There are people behind you. Try figuring out what you want before stepping in line next time.
There is now a $1 service charge if the cashier has to ask you what pump you're on. There's a $5 service charge if your answer is anything except a number. Over yonder, the blue car, and the Explorer aren't pump numbers.
There will also be a $1 service charge for anyone buying cigarettes who cannot tell the cashier exactly what kind they want.
You will receive a 3 day ban from the store if you drop lids, cups, straws, straw paper, or anything else on the floor or counter and do not pick it up. You're getting 52 ounces of soda for only 69 cents. The least you can do is pick up after yourself and not be a slob.
There is now a 50 cent service charge for any lottery tickets you hand to the cashier that are not winners. There are many ways to check your own tickets. There's a scanner for the customers to use in the store. There is an app. There is the old fashioned 'look at the damn numbers and see if it's a winner' method. Handing a huge stack of tickets to the cashier that you want checked is unacceptable. There are 6 other people in line waiting to be inconvenienced.
You may not purchase more than 5 items. An inconvenience store is not a grocery store. There is about 1 square foot of counter space because we do not expect you to actually shop here for all your necessities.