During game play stand next to the mail box.
Code Effect
L2,R1,Left,Circle,Up Fill all motives
L1, L2, Right, Square, L3 Gives Money
R2, L1, R1, L2, Left, Circle Helps you in your career, makes a blue gnome appear next to trash can
R2, R3, L3, L2, R1,L1 Unlock all locations
L2, R2, Up, T, L3. Unlock all objects
L1,R1,Down,X,L3,R3 Unlock all Social Options
Secrets
Get "move away" rebate
In Bust Out Mode, if you have made a contribution to the value of the house of the Sim you are staying with, when you move away you will be reimbursed for it. Take advantage of this. Buy something expensive, move away, get reimbursed (automatically), move back and use the Sim Object as if you paid for it. Be careful, if you are in debt when you move away you will have to cough up some Simoleons yourself.