Also make sure not to nano blitz, blitz everyone, or use to many tricks to get to the QB. Anytime they feel any bit of pressure they throw the ball away.
Alot of times I see people complain, then watch them play and see them using the same cheesy D play over and over again. It will make the game boring for you.
I usually try to get a good mix of zone and blitz, zone blitz and all out blitz per game. I try not to call the same play again and again. Unless its like the 4th QTR and I need to call Drop 4 or Drop 6 kinda thing.