Taken from golfpracticeguides.com:
A fairway in regulation occurs anytime your tee shot lands in the fairway! Most golf courses have 18 holes but only 14 of them have tee shots to a fairway. The other 4 holes are often par 3 holes where your tee shot is attempting to land on the green.
Do that on every par 4/5 hole on an official course. Obviously, this will be easier if you play a Custom game, turn off the wind, play from the closest tees, and play on Easy.
What else should I add? I've only been playing the Tour and have come close a few times. I haven't tried to do a custom game yet because I'm hoping to get it on Tour.