Rule #1: Length is most important.
You are not as accurate with your fairway wood as you may think. According to Arccos Golf, a scratch golfer will only hit 2.4% more fairways with their 3 wood than their driver.
To put that number into perspective, it will take this caliber of golfer three rounds of golf to hit ONE extra fairway if they use 3-wood off of the tee on every drive. That is not worth sacrificing the 15 yards over hitting the driver.
Rule #2: Find the danger left, and right, and pick a target right between these two points.
The rough is not as penalizing as some may think. If aiming down the right side of the fairway means missing the left trees more often, a few shots in the right rough is worth it.