Once my future wife decided she was sufficiently committed to me to invest her advice, she shared the following:
After a swim, when you lift your swimming goggles off your eyes without removing them, be sure to reposition them above the hairline. If you put them in the middle of your forehead, they will leave behind a red indentation that makes you look like a geek, defeating the purpose of putting in the laps in the first place.
NB: If you, um, don't have a hairline anymore, reposition them on your swim cap (if you wear one), or just take them all the way off.
Every little bit helps.