Cheat mode:
Hold R1 + R2 + L1 + L2 at starting menu.
Easy money:
To easily earn money, have your sim write novels on the computer. Fiction novels take the least amount of time, but will not bring you the most Simoleons. Romance novels will earn you the most Simoleons. After maxing out the "Writing" skill, you can make as much as 40,000 Simoleons every week.
Same day refunds:
After purchasing an item, you can get a full refund as long as you sell it the same day.
Easy skills:
To perform this trick, you will need a TV with the Cooking, Fishing, or Gardening channels and a video game system. Have one Sim watch TV on any of those channels to start earning skill points. Then, have a second Sim start playing video games on that TV. The first Sim will continue to earn skill points. Allow the Sim to sit their until they move on their own. The skill meter will continue to stay above their head. If you repeat the steps until the Cooking, Fishing, and Gardening channels have been viewed, the Sim will be learning three skills at once.
Free bookcase skills:
To learn bookcase skills for free, buy a bookcase and have your Sim begin to study. Interrupt your Sim so that they place the book on the ground; then sell the bookcase. You can use the book that is on the ground to do everything the bookcase can do.
