Over and over again I see Quarterback's drop the football from under the chin to the stomach prior to throwing the football.
I'm a firm believer in keeping the football up under the chin at all times, whether your dropping back, rolling out or simply having a catch.
The quarterback also needs to keep both hands on the football, for ball protection and to keep proper throwing mechanics (proper rotation, proper balance of shoulders and proper arm momentum).
Finally, this technique makes you look like a real quarterback!!