Games : How do you aim accurately with a bow?

When you start a new game one of the first weapons you get is the old bow. There are several benefits to those who master the use of the bow:

• It's silent unlike any other weapons you'll get in the first 5 hours of play.


• It one hit kills humans (at least in the early game).


• You can collect your arrows and reuse them - infinite ammo.

The draw back (pun) of using the bow is that it is difficult to aim. I've found the reflex sight helps but what is the trick to mastering aiming the bow?