Have you asked yourself while pulling up to the pump what side the gas tank is on? Its easy to forget if you switch cars often. Most newer model vehicles have an arrow on the gas gauge that points to the side of the car your tank is on. I was one happy girl when I heard this a few years ago, but why didn't someone tell me sooner??
Sorry if you knew this, but I do not think it is common knowledge, definitely not in my family! If you didn't know this then say good bye to pulling up the wrong side or craning your neck out the window trying to see the gas cap and say hello to the little arrow on your instrument panel that now has a purpose.