Easy crib credits
Create a team with very bad players, then play them with a team of your choice. The opposing team will be easy to beat on any difficulty setting.
In franchise mode when you are about to play a game, go to "Gamecast Live". Let it simulate the game, then take control in the fourth quarter before time runs out. You will be credited with everything that happened during simulation, and everything you did while actually playing.
During a game, turn off the penalties and when your on defense, go near the QB on their side.
When they snap the ball, sack him for lots of crib credits.
To earn some crib credits, simply browse the game's menus. The best menu is the "Game Manual" in the "Extras". It tells you how to blitz defenders, assign tight coverage, juke, etc.
Note: This trick requires some time, two players, and two controllers. Select a created team or a very good team and a very bad team. Play in quick match with the good and bad team and select "Play". Go to the options menu and change the time from 5 to 10-15 minutes long. Have the second player control the bad team and intentionally lose. Have the good team always choose the Hail Mary and the bad team choose Field Goal Block. Also, always get safeties. If done correctly, at the end you should get 5,000 to 10,000 or more crib credits.
Easy milestone completions
Create a team with 42 of the absolute worst players. Then, make them even worse by selecting each player individually and setting their attributes at 0. Note: This is very time consuming. Then, save the team, load it, and play against them with any NFL team of your choice. Make sure you have the game set to five to eight minute quarters, rookie or higher difficulty setting, and penalties at default (or higher). An easy way to complete the yardage milestones is to run out of bounds at your one yard line and start your play from there.
Easy first down
Select any Hail Mary play. When you hike the ball, wait for the three receivers to be down field, then hold R1 with your QB and run. You should get close to or a first down. This works well if you had a major loss of yards.
Easy sack
To get an easy sack, use the 4-3. Then, go up until you find the play "All Blitz O". Take the left DE and keep moving left until you get past the left OL. After the snap, run towards the QB and you should get the sack.
Turn off all of the penalties (while playing), then on the next play get the defender to go up to the quarterback without touching any of the players. And wait for him to hike the ball. Once it has been hiked, tackle him for a loss of yards.
Easy jukes
Instead of pressing L and R to juke, use the Right Analog-stick. Move it to the left for a left juke, right for a right juke, up for a stutter step, and down for a "stop short" move.
Easy kickoff
To tackle the receiving team behind the fifteen yard line most of the time, aim your kick all the way up and get a MAX kick, or close to one. Immediately after to kick, press B and start to sprint with the player. You should be the first one downfield to tackle the player with the ball.
Easy onside kicks
Move your meter as far right and as high as it can go. Then, barely kick it. Your player should run under it and catch it. However, make sure if you select the player running towards the ball that he does not hit the player on their team -- otherwise it is fair catch interference.
Easy touchdowns
To get easy QB touchdowns, play as the Falcons and use QB Bootleg to the left. If there is a defender to the left, then switch up the play or move a tight end there.
Easy two point conversion
Use a running play that makes the HB go through the middle. If there are DL in your way, press Dive and you will jump over them and get the two point conversion. Additionally, select "QB Draw" or any play where the QB can be immediately run straight through the center from the snap. This will work almost every time. Note: You will have to find which formation it is in. It is different for every team. Make sure your formation has no more than a five man frontline or the defense will throw a center run defense at you most of the time.