Whenever I fill my tank, I grab a couple of paper towels from the dispenser.
Then, leaving the gas station, I stop at the end of the driveway - it spills and dribbles back towards my right knee. I mop it up with the paper towels, and then I tell myself - "Remember to stop overfilling the tank, dummy!". This cycle has repeated hundreds of times.
There's a collar in the fill opening, don't fill above that. And, remember to grab a couple of paper towels