Easy sack:
Turn off all penalties, then get right next to the QB when you play defense. When he hikes, sack him, or wait until he drops back to get more sack yards. This is also an easy way to win the game (assuming that you score at least once and you don't screw up the sack technique somehow).
wo Birds with One Stone:
When youre trying to complete the team milestones if you play with the teams that you have to win a road game with against a team that you have to beat to earn another team milestone you can kill two birds with one stone.