The ball will not necessarily always have a flat lie, even in the fairway. Remember to adjust your stance and grip to adhere to the ball, which could be below or above your feet. For example, you'll want to choke up on the club when the ball is above your feet.
Fairway woods are clubs made for sweeping the ball off the turf leaving little or no divot behind. The large club head and wide sole produces longer shots and makes them much more forgiving clubs to use than irons.
When using your fairway woods, think "low, slow and wide" on your takeaway.
Fairway woods can be a difficult club to hit. It takes practice to hit it well and then get the most out of the club. If you have trouble hitting a fairway wood properly, try using a hybrid club or sticking to the long irons. There are irons available up to 1, while some hybrids are specifically designed to replace a high-lofted fairway wood.
Many mis-hits with a fairway wood or a hybrid club will be a topped shot or a low and thin shot that will slice to the right. To avoid topping the shot, it's important to keep your head down until contact is made with the ball.