1.) Before the snap identify a check down route such as a RB route to the flat. If the guy you want to hit isnt open, don't force it to him, just check it down or throw it away and live to play another down.
2.) Identify the defensive coverage before the snap. This takes some practice, but by seeing how the DB's line up it will eventually become obvious to you. My progression depends heavily on what coverage I am facing.
3.) Jello's comment on camera is key. At a minimum, try the 'Wide' camera so you can see the whole field easier.
4.) Try throwing throwing shorter routes more often. These can still create big plays with some frequency with good YAC. When the ball isn't in the air as long the defense has less time to get to it.
5.) Teach yourself to let go of the left stick entirely. A lot of new players will hold back on the left stick and drop back for an eternity every play. When you do that, you throw off your back foot, which causes inaccurate passes.