Work on the short passing game.
Throw those slants that allows WR and RBs to gain yards after catch
Make clutch throws to keep drives alive
HoF QBs like Brady, Brees, Ben and Rodgers - This is what they do well and really WELL!!!!
He really has to work on the 1st two. If gets to move the chains the big plays will come. A lot of time his throws were good enough to be caught but the catcher couldn't gain any further yards due to the positioning of the football. This has to change for him to become an effective passer.