I worked at my town's buisiest as station from 4am-noon during the summers. Talk about Paris Island. 8 pumps (pre-CC pay) that I had to keep track of ( and often an impatient customer who wants to pump immediately after someone hangs up the nossle), two huge coffee pots, people tossing money at you for papers/coffee/gas because they don't want to wait in line, guys buying smokes.
So much to keep track of it was amazing how little I got paid to work it. But it was strangely fun and a big challenge.
Nothing like mopping floors, doing oil changes, digging road beds and drainage ditches, unloading trucks, etc. to make you take college seriously.